The QR family of straight-4 piston engines by Nissan range from 2.0 L to 2.5 L in displacement. These motors are aluminum, dual overhead camshaft (DOHC), four-valve designs with variable valve timing and optional direct injection. The QR25DE is a 2.5 L (2488 cc) variant built in Decherd, TN with forged steel connecting rods, a steel timing chain, counter-rotating balance-shafts, and a nylon intake manifold. The engine bore is 89 mm with a stroke of 100 mm and a compression ratio of 9.5:1.[3] Output is rated 175 hp (130 kW) at 6000 rpm with 180 ft·lbf (244 Nm) of torque at 4000 rpm in the Altima and Sentra SE-R Spec V models. Altimas that are PZEV compliant create 170 hp and 175 ft·lbf of torque. Engines in the Sentra SE-R model have 165 hp (123 kW) with 175 ft·lbf (237 Nm) of torque. [4] Most recently in the 2005+ Nissan Frontier the QR25DE generates 154 hp and 173 ft·lbf of torque.[5] More Nissan QR Engine Info: Vehicle applications: Quality Used Engine Source		Email Address:* First Name:* Last Name:* Company: Phone: Fax: Make/Model:* Nissan Altima 93-97 Nissan Altima 98-01 Nissan Armada Nissan Maxima 85-88 Nissan Maxima 89-94 Nissan Maxima 95-99 Nissan Maxima 00-01 Nissan Maxima 02-03 Nissan Maxima 04-06 Nissan Murano 04-06 Privacy Policy