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Template:Infobox Automobile engine The VQ engine is a V6 motor produced by Nissan with displacements varying from 2.0 L to 4.0 L . It is an aluminum block DOHC 4-valve design with aluminum heads. It is fitted with Nissan's EGI/ECCS sequential multi-point fuel injection (MPFI) system. Later versions feature various implementations of variable valve timing and replace MPFI with direct fuel injection (marketed as NEO-Di). The VQ series engine was honored by Ward's 10 Best Engines list every year from the list's inception until 2009.

[edit] VQ20DE

This DOHC 24-valve 2.0 L (1995 cc) V6 has bore and stroke dimensions of 76 mm and 73.3 mm respectively, along with a compression ratio ranging from 9.5 to 10.0:1. It produces 150 PS (148 hp/110 kW) to 160 PS (158 hp/118 kW) @6400 rpm and Template:Convert/to @4400 rpm (lean burn).

It is fitted to the following vehicles:

• 1994–2003 Nissan Cefiro A32 and A33
• 1995–1999 Nissan QX A32

[edit] VQ23DE

[[File:NissanVQ23DEengine.JPG|thumb|right|200px|Nissan VQ23DE engine installed in a 2004 Nissan Teana J31]] The VQ23DE is a 2.3 L (2349 cc) engine equipped with CVTC (Continuously Variable-valve Timing Control). Bore and stroke are 85 mm and 69 mm, with a compression ratio of 9.8:1. It produces 173 PS (171 hp/127 kW) @6000 rpm and 166 ft·lbf (225 N·m) @4400 rpm.

It is fitted to the following vehicles:

• 2003–present Nissan Teana 230JM-J31
• 2006–present Renault Samsung Motors SM7 170 PS (168 hp/125 kW) (Neo VQ23)

[edit] VQ25DE

This engine is similar to the VQ20DE, but has a 2.5 L (2495 cc) displacement. Bore and stroke are 85 mm and 73.3 mm, with a compression ratio of 9.8 to 10.3:1. It produces 190 PS (187 hp/140 kW) to 210 PS (207 hp/154 kW) @6400 rpm and Template:Convert/to of torque. Later versions produce 186 PS (183 hp/137 kW) @6000 rpm and 171 ft·lbf (232 N·m) @3200 rpm.

It is fitted to the following vehicles:

• 1994–1998 Nissan Cefiro A32
• 2000–2003 Nissan Cefiro A33
• 1996–1999 Nissan Leopard FY33
• 1997–1999 Nissan Cedric Y33
• 2004–present Nissan Fuga
• 2004–present Nissan Elgrand E51
• 2008–present Nissan Teana J32

[edit] VQ25DD

The 2.5 L (2495 cc) VQ25DD uses direct fuel injection (NEO-Di) and eVTC (electronically controlled continuously variable valve timing). Bore and stroke are 85 mm and 73.3 mm respectively, with a compression ratio of 11 to 11.3:1. It produces 210 PS (207 hp/154 kW) to 215 PS (212 hp/158 kW) @6400 rpm and Template:Convert/to @4400 rpm.

It is fitted to the following vehicles:

• 1999–2002 Nissan Cefiro A33, 210 PS (207 hp/154 kW) (JDM)
• 1999–2004 Nissan Cedric/Nissan Gloria
• 2001–2006 Nissan Skyline V35, 210 PS (207 hp/154 kW)
• 2001–present Nissan Stagea M35, 215 PS (212 hp/158 kW)

[edit] VQ25DET

The VQ25DET is a turbocharged 2.5 L (2495 cc) engine with CVTC. Bore and stroke are 85 mm and 73.3 mm, with a compression ratio of 8:5:1. It produces 280 PS (276 hp/206 kW) @6400 rpm and 300 ft·lbf (410 N·m) @3200 rpm.

It is fitted to the following vehicles:

• 2001–2004 Nissan Stagea 250tRS FOUR V and RX FOUR (M35)

[edit] VQ25HR

The 2.5 L VQ25HR (for "High Revolution" or "High Response") is only available on rear wheel drive vehicles. Bore and stroke are 85 mm and 73.3 mm, with a compression ratio of 10.3:1. It produces 223 PS (220 hp/164 kW) to 225 PS (222 hp/165 kW) @6,800 rpm and 194 ft·lbf (263 N·m) @4,800 rpm. It has CVTC, microfinished camshafts and a redline of 7,500 rpm.

It is fitted to the following vehicles:

• 2006–present Nissan Skyline V36 250GT Sedan - 225 PS (222 hp/165 kW)
• 2004–present Nissan Fuga Y50 250GT - 223 PS (220 hp/164 kW)

[edit] VQ30DD

The 3.0 L (2987 cc) VQ30DD features direct injection (NEO-Di) and eVTC. Bore and stroke dimensions are 93 mm and 73.3 mm, with a compression ratio of 11.0:1. It produces 230 PS (227 hp/169 kW) to 260 PS (256 hp/191 kW) @6400 rpm and Template:Convert/to @3600 rpm.

It is fitted to the following vehicles:

• 1997–1999 Nissan Leopard Y33 230 PS (227 hp/169 kW) and 217 ft·lbf (294 N·m)
• 1999–2004 Nissan Cedric Y34
• 1999–2004 Nissan Gloria Y34 240 PS (237 hp/177 kW) and 228 ft·lbf (309 N·m)
• 2001–2004 Nissan Skyline V35
• 2001–2004 Nissan Stagea M35 260 PS (256 hp/191 kW) and 239 ft·lbf (324 N·m)

[edit] VQ30DE

The 3.0 L (2987 cc) VQ30DE has a bore and stroke of 93 mm and 73.3 mm respectively with a compression ratio of 10.0:1. It produces 193 PS (190 hp/142 kW) to 230 PS (227 hp/169 kW) @6400 rpm and Template:Convert/to @4400 rpm. The VQ30DE was on the Ward's 10 Best Engines list from 1995 through 2001. It is an aluminum open deck block design with microfinished internals and a relatively light weight.

An improved version of the VQ30DE is known by the designation VQ30DE-K. The K designation stands for the Japanese word kaizen which translates to "improvement". The engine was used in the 2000-2001 Nissan Maxima and adds a true dual-runner intake manifold for better high-end performance compared to some earlier Japanese and Middle-East market versions of this engine. The VQ30DEK produces 226 PS (223 hp/166 kW). The 1995-1999 US spec VQ30DE was equipped with only a single runner intake manifold.

It is fitted to the following vehicles:

• 1994–1998 Nissan Cefiro (A32), 220 PS (217 hp/162 kW) and 206 ft·lbf (279 N·m)
• 1995–1999 Nissan QX (A32)
• 1995–1999 Nissan Maxima (A32), 192 PS (189 hp/141 kW) and 205 ft·lbf (278 N·m)
• 1996–1999 Infiniti I30 (A32), 192 PS (189 hp/141 kW) and 205 ft·lbf (278 N·m)
• 2000–2001 Nissan Maxima (A33), 225 PS (222 hp/165 kW) and 217 ft·lbf (294 N·m); 230 PS (227 hp/169 kW) for Anniversary Edition SE
• 2000–2001 Infiniti I30 (A33), 230 PS (227 hp/169 kW) and 217 ft·lbf (294 N·m)
• 1999–2003 Nissan Bassara U30, 223 PS (220 hp/164 kW) and 206 ft·lbf (279 N·m)
• 1998–2003 Nissan Presage U30, 223 PS (220 hp/164 kW) and 206 ft·lbf (279 N·m)

[edit] VQ30DET

The 3.0 L (2987 cc) VQ30DET is a turbocharged version of the VQ30DE. Bore and stroke remain the same at 93 mm and 73.3 mm respectively, and it has a compression ratio of 9.0:1. It produces 270 PS (266 hp/199 kW) and 271 ft·lbf (367 N·m). From 1998 onwards, it produces 280 PS (276 hp/206 kW) @6000 rpm and 285 ft·lbf (386 N·m) @3600 rpm.

It is fitted to the following vehicles:

• 1995–2004 Nissan Gloria Y33,Y34
• 1995–2004 Nissan Cedric Y33,Y34
• 1997–1999 Nissan Leopard Y33
• 2001–present Nissan Cima F50

[edit] VQ30DETT

The twin-turbo VQ30DETT is an engine used in Nissan's race cars, primarily in the Super GT (formerly the JGTC). First used on the Skyline GT-R race cars during the 2003 season, this engine currently powers the Fairlady Z race cars - homologation rules allow them to use the VQ30DETT in lieu of the stock VQ35DE. Race output of this engine is estimated at around 480 PS (473 hp/353 kW).

The VQ30DETT was replaced in 2007 by the VK45DE for use in the Super GT Fairlady Z's and latterly in the GT-R.

It is fitted to the following vehicles:

• 2003–2004 Skyline GT-R JGTC race cars
• 2004–2005 Fairlady Z JGTC race cars
• 2005–2006 Fairlady Z Super GT race cars

[edit] VQ35DE

The 3.5 L (3498 cc) VQ35DE is used in many modern Nissan vehicles. Bore and stroke are 95.5 mm and 81.4 mm. It uses a similar block design to the VQ30DE, but adds variable valve timing. It produces 231 PS (228 hp/170 kW) to 302 PS (298 hp/222 kW) of power and Template:Convert/to of torque.

The VQ35DE is built in Iwaki and Decherd, TN. It was on the Ward's 10 Best Engines list from 2002 through to 2007. It features forged steel connecting rods, a microfinished one-piece cast camshaft, and Nissan's nylon intake manifold technology. It has low-friction molybdenum-coated pistons and the intake is a high-flow tuned induction system.

A modified version of the VQ35DE, called the S1, is produced by Nismo (Nissan's motorsports and performance division) for the Fairlady Z S-Tune GT. It produces 300 PS (296 hp/221 kW) at 7,200 rpm, a higher rev-limit than that of the original VQ35DE. The 350Z GT-S concept has a VQ35DE equipped with a switchable Novidem supercharger, producing around 382 PS (377 hp/281 kW) with the supercharger switched on. The engine may possibly be referred to as the VQ35DER if the GT-S goes into production.

It is fitted to the following vehicles: North American

• 2001–2004 Nissan Pathfinder (240 hp)
• 2001–2004 Infiniti QX4 (240 hp)
• 2002–2004 Infiniti I35 (255 hp)
• 2002–present Nissan Altima (240 to 270 hp)
• 2002–present Nissan Maxima (255 to 290 hp)
• 2003–2006 Nissan 350Z (287 to 296 hp)
• 2003–2004 Infiniti G35 (260 to 280 hp) all models
• 2005–2006 Infiniti G35 (280 hp) automatic transmission models
• 2005–2006 Infiniti G35 (298 hp) manual transmission models
• 2003–present Infiniti FX35 (275 to 303 hp)
• 2008–present Infiniti EX35 (297 hp)
• 2003–present Nissan Murano (Z50) (245 to 265 hp)
• 2004–present Nissan Quest (235 hp)
• 2006–present Infiniti M35 (275 hp)

JDM and other markets

• 2000–present Nissan Elgrand 240 PS (237 hp/177 kW)
• 2001–present Nissan Stagea 272 PS (268 hp/200 kW) and above
• 2001–present Renault Vel Satis 241 PS (238 hp/177 kW)
• 2002–present Nissan Skyline (V35) 272 PS (268 hp/200 kW) and above
• 2003–present Nissan Teana/Cefiro (350JM-J31) 231 PS (228 hp/170 kW)
• 2003–present Nissan Presage
• 2003–present Renault Espace 241 PS (238 hp/177 kW)
• 2004–present Nissan Fuga 280 PS (276 hp/206 kW)
• 2005–present Nismo Fairlady Z S-Tune GT 300 PS (296 hp/221 kW) (VQ35DE S1 engine)
• 2006–present Renault Samsung Motors SM7 217 PS (214 hp/160 kW) (Neo VQ35)
• 2008–present Renault Laguna Coupé 241 PS (238 hp/177 kW)

[edit] VQ35HR

The VQ35HR update was first seen in the US in the 2007 G35 Sedan models. Nissan updated the VQ line with the addition of the 3.5 L VQ35HR (for "High Revolution" or "High Response"). It produces 315 PS (311 hp/232 kW) (US Market: 306 PS (302 hp/225 kW) due to new US federal measurement regulations) at 6,800 rpm and Template:Convert/kgm at 4,800 rpm, using a compression ratio of 10.6:1. It has NDIS (Nissan Direct Ignition System) and CVTC with hydraulic actuation on the intake cam and electromagnetic on the exhaust cam. Redline is 7,500 rpm. Reportedly over 80% of the internal components were redesigned or strengthened to handle an increased RPM range sporting a lofty 7,500 rpm red line. A new dual-path intake (two air cleaners, throttle bodies, etc.) lowers intake tract restriction by 18 percent and new equal-length exhaust manifolds lead into mufflers that are 25 percent freer flowing for all around better gas flow. The new intake is said to benefit from a ram-air effect adding three horsepower at 60 mph (not accounted for by SAE testing methods). The electrically actuated variable valve timing on the exhaust cams to broaden the torque curve is new over the "DE" engine. The new engine block retains the same bore and stroke, but the connecting rods were lengthened and the block deck was raised by 8.4 mm to reduce piston side-loads. This modification, along with the use of larger crank bearings with main bearing caps reinforced by a rigid ladder-type main cap girdle to allow the engine reliably rev to 7500 rpm. With an increase in compression ratio from 10.3:1 to 10.6:1 these changes add 26 more horsepower (306 total + 3 hp ram air efect not measured by SAE testing = 309 hp). Peak torque is down 2 pound-feet from the old "DE" engine (268 vs. 270) but the torque curve is higher and flatter across most of the rpm range, and especially in the lower rpm range. Earlier "HR" engines have been known to experience oil consumption issues, according to Infiniti's ITB08-002 document, titled "2005-2007 Engine Oil Level is Low," which was released in 2008.

The VQ35HR fitted to the following vehicles:

• 2007–2008 Infiniti G35 Sedan
• 2007–present Nissan Skyline V36 350GT Sedan
• 2007–2008 Nissan 350Z
• 2008–present Infiniti EX Crossover SUV
• 2009–present Infiniti FX Crossover SUV
• 2009–present Infiniti M35

[edit] VQ37VHR

The VQ37VHR is a 3.7 L (3696 cc) engine with an increased compression ratio of 11.0:1, with a 95.5 mm bore and 86 mm stroke, while redline remains at 7500 rpm. It is rated at 333 PS (328 hp/245 kW) at 7,000 rpm and Template:Convert/kg.m at 5,200 rpm. Although the engine gains only Template:Convert/kg.m peak torque over the VQ35HR and this higher torque arrives at 5200 rpm vs. 4800 in the VQ35HR, the torque curve itself is improved and flattened via VVEL variable valve timing for better throttle response. It marks the first use of Nissan's VVEL (Variable Valve Event and Lift) system on a production vehicle in the US market.

It is fitted to the following vehicles:

• 2008–present Infiniti G37
• 2008–present Nissan Skyline V36 370GT Coupe
• 2009–present Infiniti FX37
• 2009–present Infiniti EX37
• 2009–present Nissan 370Z
• 2009–present Nissan Fairlady Z (Z34)

[edit] VQ40DE

The VQ40DE is a 4.0 L (3954 cc) variant of the VQ35DE due to a longer stroke. Bore and stroke are 95.5 × 92.0 mm.

Improvements include continuously variable valve timing, variable intake system, silent timing chain, hollow and lighter crankshafts and friction reduction (microfinished surfaces, moly coated pistons). It has Nissan's direct ignition system with platinum-tipped spark plugs. It produces 268 PS (264 hp/197 kW) to 273 PS (269 hp/201 kW) @5600 rpm and 284 ft·lbf (385 N·m) @4000 rpm.

It is fitted to the following vehicles:

• 2005–present Nissan Frontier
• 2005–present Nissan Xterra
• 2005–present Nissan Pathfinder (270 hp @5600 rpm; 291 ft·lbf (395 N·m) @4000 rpm)
• 2009–present Suzuki Equator

[edit] See also

• List of Nissan engines

[edit] Sources

• Powerful Pair: Nissan says new V6 engines increase power, fuel economy. AutoWeek. Retrieved on August 29 2006.

ja:日産・VQエンジン