Nissan QR Engine - QR25DE

The QR25DE is a 2.5 L (2488 cc) variant built in Decherd, TN with cast steel connecting rods, a steel timing chain, counter-rotating balance shafts, and an aluminum intake manifold. The engine bore is 89 mm with a stroke of 100 mm and a compression ratio ranging from 9.5:1 to 10.5:1 depending on the vehicle.

Output is rated 175 hp (130 kW) at 6000 rpm with 180 lb·ft (244 N·m) of torque at 4000 rpm in the Altima 2.5 and Sentra SE-R models. Altimas that are PZEV compliant create 170 hp (130 kW) and 175 lb·ft (237 N·m) of torque. In the 2005+ Nissan Frontier the QR25DE generates 154 hp (115 kW) and 173 lb·ft (235 N·m) of torque. The crankshaft comes fully balanced allowing removal of the counter shafts built into the older style QR25. The newer versions are also equipped with a composite intake manifold and compression has been bumped up to 10.5:1

Vehicle applications:

• 2002-2006 Nissan Sentra SE-R 165 hp & SE-R Spec V 175 hp
• 2007–present Nissan Sentra SE-R 177 hp & SE-R Spec V 200 hp
• 2002–present Nissan Altima 2.5, 2.5S, 2.5SL 175 hp, Hybrid 158 hp
• 2001–present Nissan Serena C24, 158 hp (118 kW)
• 1999-2003 Nissan Bassara
• 2001-2007 Nissan X-Trail T30 APEC export version, 178 hp (133 kW)
• 2005–present Nissan Frontier King Cab XE 4x2 154 hp
• 2003-2005 Nissan Teana 160 hp (120 kW) and 240 nm
• 2008–present Nissan Rogue 170 hp (130 kW)
• 2007–present Nissan X-Trail T31 169 hp (126 kW)
• 2009–present Suzuki Equator Extended Cab 4x2 152 hp
• 2002-2009 Nissan Presage