Voltec 120v Charger. Model 2348-7635 / Used / Good Conditions on 2040-parts.com

Audi RS7: 2013 Detroit Auto Show

The new Audi RS7 has been revealed at the Detroit Auto Show complete with the 552bhp 4.0 litre V8 from the new Audi RS6 Avant. With the same 552bhp 4.0 litre V8 the new RS6 Avant gets, the 2013 RS7  has permanent 4WD and can get to 62mph in the same blistering time as the RS6 Avant – 3.9 seconds – and on to a top speed of 155mph. That is unless you specify the Dynamic or Dynamic Plus package and then the RS7 can hit either 174mph or 189mph.

Win a copy of Hans Mezger’s Porsche autobiography

Click here to win a copy of Hans Mezger's book. The new March 2012 issue of CAR Magazine features a 35-page Porsche special, led by our exclusive first ride in the new Boxster S. There’s also a 1400-mile American road trip in the latest Porsche 911, everything you need to know about the £645k 918 Spyder hybrid supercar, and your guide to buying the best used Porsches.

Chevrolet Corvette Z06 actually gets 650 bhp and 650 lb/ft of torque

The new Chevrolet Corvette Z06 Convertible (pictured) gets 650 bhp The American are found of telling us there’s no substitute for cubic inches, but throw in a supercharger to the equation and numbers become even more appealing, and more linear than a turbo too. So the fact the 6.2 litre V8 under the bonnet of the new Corvette Z06 already manages 465 bhp in naturally aspirated guise, it wasn’t a stretch when the car world was expecting around 625 bhp when Chevrolet finally revealed the power for the Z06. But it’s more.