GM High Feature engine

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title: "GM High Feature engine" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["general-motors-engines", "v6-engines", "gasoline-engines-by-model"] topic_path: "general/general-motors-engines" source: "https://en.wikipedia.org/wiki/GM_High_Feature_engine" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::data[format=table title="Infobox automobile engine"]

FieldValue
nameGM High Feature V6
imageAlloytec V6 (LPG) engine of a 2006-2008 Holden VE Commodore 1.jpg
captionAlloytec LPG V6 engine in a 2006-2008 Holden VE Commodore
manufacturerGeneral Motors
akaAlloytec V6
production2004–present
predecessor
configuration60° V6
blockAluminum
headAluminum
valvetrainDOHC 4 valves × cyl. with VVT
fuelsystemSequential multi-port fuel injection
Direct injection
fueltypeGasoline, E85, LPG
oilsystemWet sump
coolingsystemWater-cooled
turbochargerTwin-turbo (in some models)
compression9.5:1, 10.0:1, 10.2:1, 10.3:1, 11.3:1, 11.5:1, 11.7:1, 12.2:1
displacement
bore
stroke
redline6500–7200
emissions levelEuro 6
power201-464 hp
torque182-445 lbft
::

| name = GM High Feature V6 | image = Alloytec V6 (LPG) engine of a 2006-2008 Holden VE Commodore 1.jpg | caption = Alloytec LPG V6 engine in a 2006-2008 Holden VE Commodore | manufacturer = General Motors | aka = Alloytec V6 | production = 2004–present | predecessor = | configuration = 60° V6 | block = Aluminum | head = Aluminum | valvetrain = DOHC 4 valves × cyl. with VVT | fuelsystem = Sequential multi-port fuel injection Direct injection | fueltype = Gasoline, E85, LPG | oilsystem = Wet sump | coolingsystem = Water-cooled | turbocharger = Twin-turbo (in some models) Single-turbo (in the 2.8L LP9 and LAU) | compression = 9.5:1, 10.0:1, 10.2:1, 10.3:1, 11.3:1, 11.5:1, 11.7:1, 12.2:1 | displacement = | bore = | stroke = | redline = 6500–7200 | emissions level = Euro 6 | power = 201-464 hp | torque = 182-445 lbft

The GM High Feature engine (also known as the HFV6, and including the 3600 LY7 and derivative LP1) is a family of modern DOHC V6 engines produced by General Motors. The series was introduced in 2004 with the Cadillac CTS and the Holden VZ Commodore.

It is a 60° 24-valve design with aluminum block and heads and sequential multi-port fuel injection. Most versions feature continuously variable cam phasing on both intake and exhaust valves and electronic throttle control. Other features include piston oil-jet capability, forged and fillet rolled crankshaft, sinter forged connecting rods, a variable-length intake manifold, twin knock control sensors and coil-on-plug ignition. It was developed by the same international team responsible for the Ecotec, including the Opel engineers responsible for the 54° V6, with involvement with design and development engineering from Ricardo plc.

GM's Australian auto division Holden produced a HFV6 engine under the name "Alloytec."

History

The HFV6 was designed, tested, and produced in a joint program by Holden and Cadillac. A majority of designs into the new alloy construction, transmission pairing, and first use in production were all undertaken in Detroit (and manufactured in St. Catharines, Ontario). Holden was charged with developing smaller engines (Holden 3.2 LP1 and Saab 2.8 Turbo LP9) as well as their own Holden 3.6 and 3.0 HFV6 (called the Alloytec V6) for local models.

Cadillac and Holden both tested variations of these engines in the United States and Australia.

2.8

LP1

A 2792 cc LP1 variant was introduced in the 2005 Cadillac CTS. It was also used on the Chinese 2008 CTS. It has a 89x74.8 mm bore and stroke, sequential multi-port fuel injection and a 10.0:1 compression ratio. The LP1 was built in St. Catharines, Ontario.

Applications: ::data[format=table]

Year(s)ModelPowerTorque
2004–2006Buick Royaum (China)208 hp @ 6500 rpm184 lbft @ 3200 rpm
2007–2009Buick Park Avenue (China)201 hp @ 6500 rpm195 lbft @ 2600 rpm
2005–2007Cadillac CTS210 hp @ 6500 rpm194 lbft @ 3300 rpm
2008-2010Cadillac CTS210 hp @ 6800 rpm182 lbft @ 3600 rpm
2007–2009Cadillac SLS (China)209 hp @ 6500 rpm194 lbft @ 3300 rpm
::

LP9 {{Anchor|A28NET|Z28NET|B284}}

::figure[src="https://upload.wikimedia.org/wikipedia/commons/e/e8/2006_Saab_9-3_SportCombi_engine.jpg" caption="2.8 L turbo V6 in a 2006 [[Saab 9-3"] ::

This engine is also known as a A28NET, Z28NET, Z28NEL or B284.

The LP9 is a 2.8L turbocharged version used for the Saab 9-3, Saab 9-5, and other GM vehicles. It has the same bore and stroke as the naturally aspirated LP1, however the compression ratio is reduced to 9.5:1. The engine is manufactured at Holden's Fishermans Bend engine factory in Port Melbourne, Australia, while GM Powertrain Sweden (formerly Saab Automobile Powertrain) is responsible for turbocharging the engine. Global versions of this engine use the same horsepower rating for both metric and imperial markets – mechanical horsepower – while the Europe-only versions are rated in metric horsepower.

Applications: ::data[format=table]

Year(s)ModelPowerTorque
2005–2008Opel/Vauxhall Vectra227 hp @ 5500 rpm330 Nm @ 1900-4500 rpm
2005–2008Opel/Vauxhall Signum227 hp @ 5500 rpm330 Nm @ 1900-4500 rpm
2006–2008247 hp @ 5500 rpm350 Nm @ 1900-4500 rpm
2005Opel/Vauxhall Vectra OPC/VXR247 hp @ 5500 rpm350 Nm @ 1900-4500 rpm
2006–2008276 hp @ 5500 rpm350 Nm @ 1900-4500 rpm
2006–2009Cadillac BLS247 hp @ 5500 rpm350 Nm @ 1900-4500 rpm
2006–2008Saab 9-3 Aero247 hp @ 5500 rpm350 Nm @ 1900-4500 rpm
2009276 hp @ 5500 rpm400 Nm @ 1900-4500 rpm
2008Saab 9-3 Turbo X276 hp @ 5500 rpm400 Nm @ 1900-4500 rpm
2008Saab 9-3 Aero Convertible252 hp @ 5500 rpm350 Nm @ 1900-4500 rpm
2009276 hp @ 5500 rpm370 Nm @ 1900-4500 rpm
::

LAU

The LAU is GM's new code for the LP9 Turbo engine, its usage starting with the 2010 Cadillac SRX. In 2011, production of the Cadillac SRX with the LAU engine ceased, but the engine remained in use in the Saab 9-4X until 2012, when production of that model came to an end.

Applications: ::data[format=table]

Year(s)ModelPowerTorque
2010–2011Cadillac SRX300 hp at 5500 rpm295 lbft at 2000 rpm
2011–2012Saab 9-4X300 hp at 5500 rpm295 lbft at 2000 rpm
2009–2013Opel/Vauxhall Insignia V6 4x4256 hp @ 5500 rpm350 Nm @ 1900–4500 rpm
2009–2013Opel/Vauxhall Insignia OPC/VXR321 hp @ 5250 rpm435 Nm @ 1900–4500 rpm
2010–2012Saab 9-5 Turbo6 XWD /Aero296 hp @ 5500 rpm400 Nm @ 2000 rpm
::

3.0

LF1

The LF1 is a 2994 cc version with a bore and stroke of 89x80.3 mm produced between 2010 and 2014, equipped with spark ignition direct injection (SIDI) and a 11.7:1 compression ratio.

Applications: ::data[format=table]

Year(s)ModelPowerTorque
2010Buick LaCrosse255 hp @ 6950 rpm217 lbft @ 5600 rpm
2010–2012Buick Park Avenue (China)251 hp @ 6700 rpm218 lbft @ 2900 rpm
2010–2011Cadillac CTS270 hp @ 7000 rpm223 lbft @ 5700 rpm
2011–2013Cadillac SLS (China)268 hp @ 7000 rpm221 ftlb @ 5600 rpm
2010–2011first=Samlast=Abuelsamidtitle=Detroit Preview: 2010 Cadillac SRX reborn
2010–2012Chevrolet Equinox264 hp @ 6950 rpm222 lbft @ 5100 rpm
2010–2012GMC Terrain264 hp @ 6950 rpm222 lbft @ 5100 rpm
2010Holden VE Commodore255 hp @ 6700 rpm214 lbft @ 2900 rpm
2011Saab 9-4X265 hp @ 6950 rpm223 lbft @ 5100 rpm
2011Chevrolet Captiva255 hp @ 6900 rpm212 lbft @ 5800 rpm
2012Chevrolet Malibu (Middle East)260 hp @ 6900 rpm214 lbft @ 5600 rpm
::

LFW

The LFW is a flexible fuel version of the LF1, capable of running on E85, gasoline, or any mixture of the two. Output is identical to the LF1.

Applications: ::data[format=table]

Year(s)ModelPowerTorque
2011-2017Buick GL8 (China only)254 hp @ 6800 rpm214 lbft @ 5200 rpm
2011–2012Chevrolet Equinox264 hp @ 6950 rpm222 lbft @ 5100 rpm
2011–2012GMC Terrain264 hp @ 6950 rpm222 lbft @ 5100 rpm
2012–2013Cadillac CTS270 hp @ 7000 rpm223 lbft @ 5700 rpm
2012–2013Chevrolet Captiva Sport264 hp @ 6950 rpm222 lbft @ 5100 rpm
2010–2017Holden VE Commodore and Holden VF Commodore254 hp @ 6800 rpm214 lbft @ 5200 rpm
::

3.2 {{Anchor|N32A}}

Holden has built its own 3195 cc version of the High Feature engine in Australia produced between 2005 and 2010 with a bore and stroke of 89x85.6 mm. Branded with the Alloytec name like the 3.6L version, this version produces 227 hp at 6600 rpm and 297 Nm at 3200 rpm. It has a 10.3:1 compression ratio. Its fuel economy is 4–6 km/L in city, and 7–9 km/L on highway.. Holden also produced the 3.2L engines that were used by Alfa Romeo as the basis of its JTS V6 engine.

Applications:

3.6

| name = 3.6 | image = Alloytec V6 engine of a 2006 Holden VZ Commodore SVZ 01.jpg | caption = 3.6L engine in a Holden VZ Commodore | production = 2004–present | bore = 94 mm | stroke = 85.6 mm | displacement = 3564 cc | compression = 10.2:1, 11.3:1, 11.5:1 | fuelsystem = | fueltype = Gasoline, Autogas (LPG), E85 | weight = 168 kg (3.6L V6 High Feature engine)

{{anchor|LY7|Suzuki|N36A}} LY7

The 3564 cc LY7 engine was developed primarily by Holden and introduced in the 2004 Holden VZ Commodore and 2004 Cadillac CTS sedan. It has a 10.2:1 compression ratio, Sequential multi-port fuel injection, and a bore and stroke of 94x85.6 mm. Lower-powered versions only have variable cam phasing on the inlet cam (LE0). Selected models also include variable exhaust. The engine weighs 370 lb as installed.

This engine is produced in several locations: St. Catharines (Ontario), Flint Engine South (Michigan), Melbourne (Australia), Ramos Arizpe (Mexico), and Sagara (Japan) by Suzuki.

Suzuki's engine designation is N36A.

The dual-fuel 235 hp LW2 version was able to run on petrol and autogas. The LW2 engine was based on the low-output LE0 V6. It featured a factory-fitted dual-fuel system developed by IMPCO, different valves, and hardened titanium valve seats. This motor was available exclusively in Holden vehicles from 2005–2012.

Applications: ::data[format=table]

Year(s)ModelPowerTorque
2004–2007Buick Rendezvous CXL/Ultra242 hp @ 6000 rpm232 lbft @ 3500 rpm
2004–2007Cadillac CTS255 hp @ 6200 rpm252 lbft @ 2800 rpm
2008–2009Cadillac CTS263 hp @ 6200 rpm253 lbft @ 3100 rpm
2004–2009Cadillac SRX255 hp @ 6500 rpm254 lbft @ 2800 rpm
2004–2005Holden VZ Commodore235 hp @ 6000 rpm236 lbft @ 2800 rpm
2006–2007231 hp @ 6000 rpm236 lbft @ 2800 rpm
2004–2006Holden VZ Commodore255 hp @ 6500 rpm251 lbft @ 3200 rpm
2006–2007255 hp @ 6500 rpm247 lbft @ 3200 rpm
2005–2008Buick LaCrosse CXS240 hp @ 6000 rpm225 lbft @ 2000 rpm
2005–2007Cadillac STS255 hp @ 6500 rpm252 lbft @ 3200 rpm
2006–2007Holden VE Commodore Omega240 hp @ 6000 rpm243 lbft @ 2600 rpm
2008–2009235 hp @ 6500 rpm240 lbft @ 2400 rpm
2006–2009Holden WM Statesman/Caprice262 hp @ 6500 rpm250 lbft @ 2600 rpm
2007–2009Buick Park Avenue (China)255 hp @ 6600 rpm250 lbft @ 2800 rpm
2007–2009Cadillac SLS (China)251 hp @ 6500 rpm252 lbft @ 3200 rpm
2006–2011Holden Rodeo/Colorado211 hp @ 6500 rpm231 lbft @ 2600 rpm
2007–2008GMC Acadia275 hp @ 6600 rpm251 lbft @ 3200 rpm
2007Pontiac G6 GTP252 hp @ 6300 rpm251 lbft @ 3200 rpm
2007–2009Saturn Aura XR252 hp @ 6300 rpm251 lbft @ 3200 rpm
2007–2008Saturn Outlook XE single exhaust270 hp @ 6600 rpm248 lbft @ 3200 rpm
2007–2008Saturn Outlook XR dual exhaust275 hp @ 6600 rpm251 lbft @ 3200 rpm
2008Buick Enclave275 hp @ 6600 rpm251 lbft @ 3200 rpm
2007–2013 {{Cite webtitle=2013 Chevrolet Caprice – Prices & Specs in KSAurl=https://www.drivearabia.com/carprices/ksa/chevrolet/chevrolet-caprice/2013/website=Drive Arabia
2008–2012Chevrolet Malibu252 hp @ 6300 rpm251 lbft @ 3200 rpm
2008–2009Chevrolet Equinox Sport264 hp @ 6500 rpm250 lbft @ 2300 rpm
2008–2009Pontiac G6 GXP252 hp @ 6300 rpm251 lbft @ 3200 rpm
2008–2009Pontiac G8256 hp @ 6300 rpm248 lbft @ 2100 rpm
2008–2009Pontiac Torrent GXP264 hp @ 6500 rpm250 lbft @ 2300 rpm
2008–2009Saturn Vue XR / Red Line257 hp @ 6500 rpm248 lbft @ 2100 rpm
2007–2009Suzuki XL-7252 hp @ 6500 rpm243 lbft @ 2300 rpm
::

LLT

The 3564 cc LLT is a direct injected version based on the earlier LY7 engine. It was first unveiled in May 2006, and the DI version was claimed to have 15% greater power, 8% greater torque, and 3% better fuel economy than its port-injected counterpart. The LLT engine has a compression ratio of 11.3:1, and has been certified by the SAE to produce 302 hp at 6300 rpm and 272 lbft of torque at 5200 rpm on regular unleaded (87 octane) gasoline. This engine debuted on the 2008 Cadillac STS and CTS. GM used an LLT in all 2009–2017 Lambda-derived crossover SUVs to allow class-leading fuel economy in light of the new Corporate Average Fuel Economy (CAFE) standards. In these crossovers, the LLT engine produced up to 288 hp and 270 lbft of torque.

Applications: ::data[format=table]

Year(s)ModelPowerTorque
2008–2011Cadillac CTS304 hp @ 6400 rpm273 lbft @ 5200 rpm
2008–2011Cadillac STS302 hp @ 6300 rpm272 lbft @ 5200 rpm
2009–2017Buick Enclave288 hp @ 6300 rpm270 lbft @ 3400 rpm
2009–2017Chevrolet Traverse single exhaust281 hp @ 6300 rpm266 lbft @ 3400 rpm
2009–2017Chevrolet Traverse dual exhaust288 hp @ 6300 rpm270 lbft @ 3400 rpm
2009–2016GMC Acadia288 hp @ 6300 rpm270 lbft @ 3400 rpm
2009Saturn Outlook single exhaust281 hp @ 6300 rpm266 lbft @ 3400 rpm
2009Saturn Outlook dual exhaust288 hp @ 6300 rpm270 lbft @ 3400 rpm
2009–2011Daewoo Veritas
2009–2011Holden VE Commodore SV6281 hp @ 6400 rpm258 lbft @ 2900 rpm
2009–2011Holden WM Statesman/Caprice281 hp @ 6400 rpm258 lbft @ 2900 rpm
2010–2011Buick LaCrosse CXS280 hp @ 6400 rpm259 lbft @ 5200 rpm
2010–2011Chevrolet Camaro312 hp @ 6400 rpm278 lbft @ 5200 rpm
2010–2011Cadillac SLS (China)307 hp @ 6400 rpm276 lbft @ 5200 rpm
::

LFX

The LFX is an enhanced version of the LLT engine developed jointly by Holden and Cadillac. Introduced in the MY 2012 Holden VE Commodore SV6 and the MY2012 Chevrolet Camaro LS/LT, it is 20.5 lbs lighter than the LLT, thanks to a redesigned cylinder head, integrated exhaust manifold, and composite intake manifold. Other components like the timing chains, fuel injectors, intake valves, and fuel pump have also been updated. They also updated the cam phasing and variable valve timing system compared to the LLT. Power and torque are up slightly from the LLT. The compression ratio is 11.5:1. The LFX also features E85 flex-fuel capability.

Applications: ::data[format=table]

Year(s)ModelPowerTorqueDyno chart
2012–2016Buick LaCrosse303 hp @ 6800 rpm264 lbft @ 5300 rpmlink
2013–2015Cadillac ATS321 hp @ 6800 rpm274 lbft @ 4800 rpmlink
2012–2014Cadillac CTS
(2014 Wagon & Coupe only)318 hp @ 6800 rpm275 lbft @ 4900 rpmlink
2012–2015Cadillac CTS
(2012 - 2013 Sedan Performance Trim only)321 hp @ 6800 rpm275 lbft @ 4900 rpmlink
2012–2016Cadillac SRX308 hp @ 6800 rpm265 lbft @ 2400 rpmlink
2013–2019Cadillac XTS304 hp @ 6800 rpm264 lbft @ 5200 rpmlink
2012–2015Chevrolet Camaro323 hp @ 6800 rpm278 lbft @ 4800 rpmlink
2012–2017Chevrolet Caprice PPV301 hp @ 6700 rpm265 lbft @ 4800 rpmlink
2015–2016Chevrolet Colorado305 hp @ 6800 rpm269 lbft @ 4000 rpmlink
GMC Canyonlink
2013–2017Chevrolet Equinox301 hp @ 6500 rpm272 lbft @ 4800 rpmlink
2012–2016Chevrolet Impala/Impala Limited302 hp @ 6500 rpm262 lbft @ 5300 rpm
2014–2020Chevrolet Impala305 hp @ 6500 rpm262 lbft @ 5300 rpmlink
2013–2017GMC Terrain301 hp @ 6500 rpm272 lbft @ 4800 rpmlink
2011–2015Holden WM II/WN Caprice281 hp @ 6700 rpm258 lbft @ 2800 rpm
2011–2013Holden VE II Commodore (MY 2012)281 hp @ 6700 rpm258 lbft @ 2800 rpm
2013–2017Holden VF Commodore281 hp @ 6700 rpm258 lbft @ 2800 rpm
::

LWR

The LWR is dedicated LPG 3.6-liter engine. Introduced in the MY 2012 Holden VE Commodore, Based on the 3.6-litre LY7 engine, the LWR had a vapour injection system. The vapour injection system injected gas directly into the air intake runner, thereby preventing excess gas from circulating through the air intake system. Although liquid LPG injection generally produces more power, Holden justified vapour injection on the grounds of lower fuel consumption, lower emissions, reduced pumping and parasitic losses, and start-up reliability in hot weather.

The dedicated LPG LWR engine produced peak power and torque of 180 kW at 6000 rpm and 320 Nm at 2000 rpm. The LWR engine was mated to GM's six-speed 6L45 automatic transmission and, over the combined ADR 81/02 test cycle, the Commodore Omega achieved fuel consumption of 11.8 L/100 km – an improvement of 1.6 L/100 km compared to its dual-fuel LW2 predecessor. Furthermore, the LWR engine exceeded Euro 6 emissions standards.

  • Specially hardened valves and valve seats.
  • A redesigned cylinder head and manifold for improved air flow.
  • Variable exhaust valve timing (the LW2 engine only had variable intake valve timing)
  • Specially-developed fuel injectors.
  • New pistons with pentroof-style centre-domes and valve eyelets for a higher compression ratio of 12.2:1 (compared to 10.2:1 for the dual fuel engine).
  • A new fuel rail and a new LPG fuel filter. Applications: ::data[format=table] | Year(s) | Model | Power | Torque | |---|---|---|---| | 2012–2013 | Holden VE II Commodore (MY 2012) | 241 hp @ 6000 rpm | 236 lbft @ 2000 rpm | | 2013–2015 | Holden VF Commodore | 241 hp @ 6000 rpm | 236 lbft @ 2000 rpm | | 2012–2015 | Holden WM II/WN Caprice | 241 hp @ 6000 rpm | 236 lbft @ 2000 rpm | ::

LCS

The 3564 cc LCS was derived from the direct-injected LLT for use in hybrids, using the two-mode system. Differences from the LLT included a slightly lower compression ratio, 11.3:1, and lower power and torque peaks. It was to debut in the 2009 Saturn Vue Hybrid, where it would have made 262 hp at 6100 rpm and 250 lbft of torque at 4800 rpm. Fuel economy ratings would have been 6–8 km/L in city, and 9–11 km/L on highway. However, GM cancelled its plans for the Saturn Vue Hybrid.

LF3

The 3.6L twin-turbocharged version for the 2014 Cadillac CTS and XTS was announced at the 2013 NYAS.

The engine is rated at 420 hp of power at 5750 rpm and 430 lbft of torque at 3500–4500 rpm (with 90% of torque being available at 2500–5500 rpm) and helps the CTS achieve 0-60 mph time of 4.6 seconds with an 8-speed automatic transmission.

In essence, the twin-turbo 3.6L V6 is the forced-induction variant of the popular LFX V6 found in the Cadillac ATS, XTS, and SRX, among many other GM models, with several important upgrades, including:

  • All-new cylinder block casting
  • All-new cylinder head castings
  • Strengthened connecting rods
  • Forged steel crankshaft
  • Continuously variable valve timing
  • Large 38.3 mm intake valves and 30.6 mm sodium-filled exhaust valves
  • Machined, domed aluminum pistons with top steel ring carrier for greater strength
  • 10.2:1 compression ratio
  • Patented, integrated charge air cooler system with low-volume air ducts
  • Twin turbochargers produce more than 12 psi
  • Vacuum-actuated wastegates with electronic control valves
  • All-new direct injection fuel system
  • Tuned air inlet and outlet resonators, aluminum cam covers, and other features that contribute to exceptional quietness and smoothness

Applications: ::data[format=table]

Year(s)ModelPowerTorqueDyno chart
2014–2019Cadillac XTS404 hp @ 6000 rpm369 lbft @ 1900–5600 rpmlink
2014–2019Cadillac CTS420 hp @ 5750 rpm430 lbft @ 3500–4500 rpmlink
::

LF4

The LF4 is a higher-performance variant of the LF3 for use in the Cadillac ATS-V and Cadillac CT4-V Blackwing. Changes to the LF3 include:

  • Turbochargers with low-inertia titanium-aluminide turbines and vacuum-actuated wastegates for more responsive torque production
  • Compressors matched for peak efficiency at peak power levels, for optimal track performance
  • Patent-pending low-volume charge-cooling system that optimizes packaging efficiency and maximizes boost pressure
  • To compliment the quick spooling turbochargers, lightweight titanium connecting rods that reduce inertia of the rotating assembly were used on all ATS-V models, while only manual transmission CT4-V Blackwing models featured titanium connecting rods. 10-speed automatic CT4-V Blackwing models featured steel connecting rods.
  • Peak boost increased to 18 psi, from 12 psi
  • Higher-flow fuel injectors
  • Oil pan baffling for better oil flow at high cornering speeds

Applications: ::data[format=table]

Year(s)ModelPowerTorqueDyno chart
2016–2019Cadillac ATS-V, Cadillac ATS-V Coupe464 hp @ 5850 RPM445 lbft @ 3500 RPM2016 link
2022–presentCadillac CT4-V Blackwing472 hp445 lbft
::

LFR

The LFR is a bi-fuel variant of the LFX, although multi-point fuel injection is used for both the gasoline and CNG instead of direct-injection.

Applications: ::data[format=table]

Year(s)ModelPowerTorqueDyno chart
2015–2017Chevrolet Impala Bi-FuelCNG 232 hp @ 6000 RPMCNG 218 lbft @ 5200 RPM2016 CNG link
Gasoline 258 hp @ 5900 RPMGasoline 244 lbft @ 4800 RPM2016 Gas link
::

LFY

The LFY is similar to the LFX, but adds stop-start technology and has improved airflow.

Applications: ::data[format=table]

Year(s)ModelPowerTorque
2018–2024Buick Enclave310 hp @ 6800 rpm266 lbft @ 2800 rpm
2018–2023Chevrolet Traverse310 hp @ 6800 rpm266 lbft @ 2800 rpm
::

Fourth generation

Starting with the 2016 Cadillac models, a new generation of High Feature V6s were developed. These new engines have redesigned block architectures with bore centers increased from 103 mm on prior HFV6 engines to 106 mm and a redesigned cooling system to target the hottest areas while also facilitating faster warm-up. They also incorporate engine start-stop technology, cylinder-deactivation, 2-stage oil pumps, and updated variable valve timing featuring intermediate park technology for late-intake valve closure. Both engines debuted in the 2016 Cadillac CT6.

3.0 L

LGW

Bore and stroke of 86x85.8 mm are used, along with a 9.8:1 compression ratio and twin turbos with titanium-aluminide turbine wheels. Maximum engine speed is 6500 RPM. Premium unleaded fuel is required.

Applications: ::data[format=table]

Year(s)ModelPowerTorqueDyno chart
2016–2019Cadillac CT6404 hp @ 5700 RPM400 lbft @ 2500-5100 RPMdyno chart
::

LGY

Bore and stroke of 86x85.8 mm are used, along with a 9.8:1 compression ratio and twin turbos with titanium-aluminide turbine wheels. Maximum engine speed is 6500 RPM. Premium unleaded fuel is required.

Applications: ::data[format=table]

Year(s)ModelPowerTorqueDyno chart
2020–presentCadillac CT5335 hp @ 5600 RPM405 lbft @ 2400-4400 RPM
V: 360 hp @ 5600 RPMV: 405 lbft @ 2400-4400 RPM
::

3.6 L

LGX

Along with the increased bore spacing, the new 3.6 L DI V6 has larger bores than before, growing from 94 mm to 95 mm with the same 85.8 mm stroke as the 3.0L LGW, for a displacement of 3649 cc. Intake and exhaust valves are also increased in size along with other changes to the cylinder head. The only part shared with the prior generation is the hydraulic lash adjusters in the valvetrain. The LGX was benchmarked against the 3.7L VQ37VHR of the 2015 Infiniti Q40. Compression ratio is 11.5:1 and maximum engine speed is 7200 RPM.

Compared to GM's LFX/LFY 3.6 L engine, the LGX features active fuel management, NVH enhancements and slightly more torque.

The LGX was on Ward's 10 Best Engines for 2016.

Applications: ::data[format=table]

Year(s)ModelPowerTorqueDyno chart
2016–2019Cadillac ATS335 hp @ 6800 RPM285 lbft @ 5300 RPM2016 link
2016–2019Cadillac CT6335 hp @ 6800 RPM284 lbft @ 5300 RPM2016 link
2016–2019Cadillac CTS335 hp @ 6800 RPM285 lbft @ 5300 RPM2016 link
2016–2024Chevrolet Camaro335 hp @ 6800 RPM284 lbft @ 5300 RPM2016 link
2017–2019Buick LaCrosse310 hp @ 6800 RPM282 lbft @ 5200 RPM
2018–2020Buick Regal GS310 hp @ 6800 RPM282 lbft @ 5200 RPM
2018–2020Holden ZB Commodore315 hp @ 6800 RPM281 lbft @ 5200 RPM
2017–presentCadillac XT5310 hp @ 6600 RPM271 lbft @ 5000 RPM
2017–2023GMC Acadia310 hp @ 6600 RPM271 lbft @ 5000 RPM
2019–presentChevrolet Blazer308 hp @ 6600 RPM269 lbft @ 5000 RPM
2020–2025Cadillac XT6310 hp @ 6600 RPM271 lbft @ 5000 RPM
::

LGZ

The LGZ is a variant of the LGX designed for use in the Chevrolet Colorado and GMC Canyon.

Applications: ::data[format=table]

Year(s)ModelPowerTorque
2017–2022GMC Canyon308 hp @ 6800 RPM275 lbft @ 4000 RPM
Chevrolet Colorado
::

7.2L V12

On March 21, 2007, AutoWeek reported that GM was planning to develop a 60-degree V12 based on this engine family to power the top version of Cadillac's upcoming flagship sedan. This Cadillac would essentially have had two 3.6L High Feature V6s attached crankshaft-to-crankshaft and would have featured high-end technologies including direct injection and cylinder deactivation. If this engine were developed, it would have displaced 7.2 liters, and produced approximately 600 hp and 540 lbft of torque. Development of the engine was reportedly being conducted in Australia by Holden, with a potential HSV or Statesman application.

In August 2008, GM announced that development of the V12 had been cancelled.

Timing chain issues

Earlier production 2.8L, 3.0L, 3.2L, and 3.6L engines with the three chain design suffered from premature timing chain failures because of a faulty PCV system and extended oil change intervals. Most of the problems occurred on pre-LFX engines.

Holden High Feature engine

Holden sold a HFV6 engine under the name Alloytec. The High Feature moniker on the Holden produced engine is reserved for the twin cam phasing high output version. The block was designed to be expandable from 2.8 L to 4.0 L. High Feature V6 engines were previously produced in Fishermans Bend, Port Melbourne, Australia, and remain in production at the following four manufacturing locations: St. Catharines Engine Plant, St. Catharines, Canada; Flint Engine South in Flint, Michigan, United States; Romulus Engine Plant in Romulus, Michigan; and Ramos Arizpe, Coahuila, Mexico. The assembly lines for the St. Catharines and Flint facilities were manufactured by Hirata Corporation at its powertrain facility in Kumamoto, Japan. Most of the designs of this motor happened in Flint. They were first produced for the Cadillac range. The engine block and cylinder heads are cast at Defiance Foundry in Defiance, Ohio.

References

References

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