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The Honda Oval Piston
Honda's CRAZY Oval Piston Engine - YouTube
VW's 2.3L oval-piston diesel | TDIClub Forums
The Honda Oval Piston
Speed Physics - In 1990 Volkswagen tested an oval piston version of their 1.6 liter diesel engine bringing it to 2.3. Not much is known about it. Rumours are that they wanted