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

Top 5 most important cars at the 2013 Frankfurt motor show

The five most important memorable cars in attendance at the world’s biggest motor show Nothing is as controversial as irritating your core enthusiasts, and the Audi Sport Quattro concept risks doing just that. Its name and styling riff off one of the most iconic cars in Audi’s back catalogue – and in WRC history – yet the new yellow version unveiled at the 2013 Frankfurt motor show has abandoned the five-cylinder engine, manual gearbox, and respectable kerbweight of the 2010 Quattro concept. In its place, we’ve an RS7-based coupe with the power of a Lamborghini Aventador (691bhp), twice the claimed economy of a Golf GTD (113mpg), but only because of a twin-turbo V8 mated to a hefty hybrid powertrain, and that means this new Sport Quattro weighs as much as a Bugatti Veyron Super Sport (1845kg).

Record expected for Auto Union sale

By James Mullan Motor Industry 07 February 2007 09:21 A rare 1939 Auto Union Type D grand prix car is tipped to tear up the record books this month when it goes under the hammer – for an estimated price of up to £7.8 million. Auto Union developed the Type D racing car with a mid-mounted 3.0-litre 12-cylinder engine; in 1939, it was modified with the addition of a twin supercharger, increasing power 420bhp to 460bhp – enough for a top speed of 205mph. This particular car won the French and Yugoslavian Grand Prix in 1939, but at the end of the Second World War it was transported from East Germany to the former Soviet Union by Russian occupation forces as spoils of war.

Ferrari F450 prototype spied as F430 successor heads for Frankfurt debut

Spy photographer Brenda Priddy serves up a fresh look at the Ferrari F450, the car set to replace the F430 in Ferrari's lineup later this year. From this prototype, spotted being loaded into a hauler, we see that the styling is updated but not a radical departure from the F430. The new model designation comes from an increase in displacement for the V8 to 4.5 liters.