In depth: Acura's 2.3L turbocharged I-4 engine

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Filed under: LA Auto Show, Tech, Acura
When Acura designed the RDX, they wanted to give it a lightweight mill that was powerful enough to compete in a class rife with six-cylinder power. A V6 would provide the desired output, but it would add too much mass over the front axle, so instead, Acura decided to slap a turbo onto a four-cylinder and boost output accordingly. Honda, Acura's parent company, has developed some of the best performing four bangers in terms of horsepower-per-liter, so the engineers had a lot of innovation at their fingertips. The package put together for the RDX is a 2.3-liter inline-four, complete with Honda's i-VTEC variable valve timing and creating 240 hp at 6000 rpms and 260 ft-lbs of torque at 4500 rpm. Thanks to the addition of the turbocharger, it makes more torque than any other engine in Acura's lineup -- not a huge feat considering that most of Honda/Acura engines are devoid of any low-end grunt. The engine also features some economical innovations to keep the RDX's price tag from skyrocketing, so when we found this engine on display at the Acura booth at the 2007 Los Angeles Auto Show, we thought a closer look was in order. Follow the jump for an in-depth view with pictures from the display engine and Acura's own renderings.

Gallery: Acura's 2.3L Turbocharged i-VTEC Engine

Continue reading In depth: Acura's 2.3L turbocharged I-4 engine

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