Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Mazda brings diesel back to Indy with 6 Skyactiv-D

Diesel has enjoyed great success lately as a racing fuel, but there's one place it hasn't appeared for more than six decades: Indianapolis Motor Speedway. Mazda's breaking that dry spell this weekend, when its Mazda 6 Skyactiv-D race car will head to Indy for the Grand-Am race. We like the 6 in both road trim and racing livery, but that previous diesel-powered racer -- the Cummins Diesel Special -- is pretty neat too.

Porsche to delay entry-level roadster, report says

Porsche plans to delay the introduction of an entry-level roadster amid worries that the car could dilute the brand's image, CEO Matthias Mueller was quoted as saying in a German magazine. "Possibly we need to wait until the next generation of customers before the idea of a small roadster will work for Porsche," Mueller was quoted the business publication Wirtschaftswoche on Jan. 15.

Daimler, Renault are set to share vehicle platforms and engines

Following a year of intensive high-level talks and secretive, behind the scenes strategy meetings, Daimler AG and Renault SA have agreed on plans that will see their car-making divisions--Mercedes-Benz, Smart, Renault and Nissan--share resources on a wide range of products. The move signals more consolidation within the European automotive industry. Daimler chairman Dieter Zetsche and Renault president Carlos Ghosn have set out three primary areas of cooperation that will see the carmakers share small-car and light-commercial-vehicle platforms, small gasoline and diesel engines, and electric drive systems.