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What Are H4 Engines & Which Notable Car Brands Have Them Under The Hood?
H4 engines are horizontally opposed four-cylinder engines also commonly known ... The air-cooled flat-4 VW Beetle owes its origins to a Ferdinand Porsche design from the 1930s.
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In depth: Acura's 2.3L turbocharged I-4 engine
Follow the jump for an in-depth view with pictures from the display engine and Acura's own renderings. Using a small four-cylinder, as opposed to a V6 engine configuration, has a significant ...