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Audi S8 tuned to 640 hp by ABT Sportsline

Volkswagen Group tuning house ABT Sportsline debuted its latest version of Audi's flagship luxury-sport sedan, the Audi S8. The already quick sedan has received a facelift for the 2015 model year, as revealed a few months ago at the 2013 Frankfurt Motor Show, and it didn't take ABT Sportsline long to get their hands on the latest version. While Audi's changes to the exterior have been relatively mild, with restyled front and rear bumpers and a slightly redesigned grille, the tuning house once again focused on changes under the hood.

Some Chevrolet dealerships halt Volt sales due to tool costs

Some Chevrolet dealers have stopped carrying the Volt after deciding that their sales didn't justify an additional $5,100 for tools to service the plug-in hybrid. Last month, General Motors notified Chevrolet dealers of the added cost for tools, among other requirements, to keep selling and servicing the Volt. The math didn't work for Allyn Barnard, owner of Jim Barnard Chevrolet in Churchville, N.Y., near Rochester.

Chevrolet rolls out high-performance tires and wheels for the 2012 Corvette

The introduction of high-performance tires and racing-style wheels for the Z06 and ZR1 models is the major change to the Chevrolet Corvette for the 2012 model year, according to information being posted at Corvette fan sites on the Internet. Info is leaking out as Chevy is set to officially talk about the 2012 Vette during the annual C5/C6 Bash fan event at the National Corvette Museum in Bowling Green, Ky., this weekend. Look for some official news on April 28.