Nissan VQ engine

The VQ is a family of V6 automobile petrol engines developed by Nissan and produced in displacements varying from 2.0 L to 4.0 L. Designed to replace the VG series, the all-aluminium 4-valve per cylinder DOHC design debuted with Nissan's EGI/ECCS sequential multi-point fuel injection (MPFI) system. Changes from the VG engine include switching to a timing chain from a timing belt, and relocating the water pump from the outside of the engine to inside the timing cover where the pump is driven by the timing chain. Later versions featured various improvements, such as variable valve timing, and NEO-Di designated VQ engines replace MPFI with direct fuel injection.

The VQ series engine was honored in a record 14-straight selections by Ward's 10 Best Engines from the list's inception until 2008.

1st gen (1994-)

The VQ20DE is an aluminium block, aluminium head, DOHC 24-valve 2.0 L (1,995 cc) V6, with a 76 mm × 73.3 mm (2.99 in × 2.89 in) bore and stroke and compression ratio ranging from 9.5 to 10.0:1. In base form it produces 150 PS (110 kW; 148 hp) to 160 PS (118 kW; 158 hp) at 6400 rpm and 137 to 145 lb⋅ft (186 to 197 N⋅m) at 4400 rpm (lean burn).

It is fitted to the following vehicles:

The VQ23DE displaces 2.3 L (2349 cc) and is eqontinuously Variable-valve Timing Control). Bore and stroke are 85 mm × 69 mm (3.35 in × 2.72 in), and compression ratio is 9.8:1. It produces 173 PS (127 kW; 171 hp) at 6000 rpm and 166 lb⋅ft (225 N⋅m) at 4400 rpm.

It is fitted to the following vehicles:

The VQ25DE is similar to the VQ20DE, but is .5 L larger, at 2.5 L (2,496 cc) displacement. Bore and stroke are 85 mm × 73.3 mm (3.35 in × 2.89 in), with a compression ratio of 9.8 to 10.3:1. It produces 190 to 210 PS (140 to 154 kW; 187 to 207 hp) at 6400 rpm and 174 to 195 lb⋅ft (236 to 264 N⋅m) of torque. Later versions produce 186 PS (137 kW; 183 hp) at 6000 rpm and 171 lb⋅ft (232 N⋅m) at 3200 rpm. In some Nissans, this engine was replaced by the QR25DE.