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May 15th, 2009 admin No comments

Exhaust Cam

New Year And A New Engine For The Volvo V50

Volvo's V50 compact wagon returns for 2010 with a choice of normally aspirated or turbocharged five-cylinder engines.

Standard on the base 2.4i model is a 2.4-liter inline five. Known as the B5244S4, the 2.4-liter engine is part of Volvo's Modular Engine family. It is all aluminum, with 20 valves, belt-driven dual overhead camshafts, and continuously variable valve timing on the intake cam only. With a compression ratio of 10.3:1, it has 168 horsepower and 170 lb-ft of torque.

The 2.4-liter engine's low-speed torque is modest for the V50's weight, so it must be worked hard for good passing response. Its unusual five-cylinder layout produces a raspy sound on hard acceleration and an unpleasant drone at high speeds, although changes for 2008 made it quieter than before. It produces good fuel economy; EPA ratings are 20/31 city/highway, although Volvo recommends premium fuel.

The T5 R-Design comes standard with a 2.5-liter turbocharged engine. Known as the B5254T3, the 2.5-liter five is similar to the 2.4, but has a longer stroke, a 9.0:1 compression ratio, and variable valve timing on both the intake and exhaust cams. The B5254T3 features a Volvo-designed light-pressure turbocharger, built into the exhaust manifold. With up to 10 pounds of boost, it produces 227 horsepower and 236 lb-ft of torque. Volvo claims that 100% of maximum torque is available from 1,500 to 5,000 rpm.

Despite Volvo's efforts to reduce turbo lag, the 2.5-liter engine feels lethargic at low speeds, although it produces reasonably strong performance when pushed. Most critics find it noticeably quieter than the 2.4-liter engine.

In the past, the turbo engine was no thirstier than the 2.4-liter, but the T5 R-Motion is now available only with all-wheel drive, which is not available on the 2.4i. EPA estimates have dropped to 19/27 with automatic, 20/26 with manual transmission.

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Learn more about Volvo V50 Engine and other industry specific topics by visiting the company website.