Stud Boy Power Point Carbide Push-through Studs Without Locknuts 2350-p2-ps on 2040-parts.com

The thinking man’s M3: Alpina D3 Bi-Turbo is world’s fastest diesel production car

German tuning firm Alpina has been tweaking BMWs since it started back in 1965 – in fact, it helped BMW develop the legendary 3.0 CSL, so it seems it knows its onions. However, its latest effort is something a little different. Not quite a conventional performance car, the 2013 Alpina D3 Bi-Turbo is actually the world’s fastest diesel production car, according to the firm.

Exclusive -- Mercedes-Benz GT AMG spy shots

On Monday, we told you about the 911-fighting Mercedes-Benz GT AMG, which is scheduled to debut at the German Grand Prix in 2014. Today, we have fresh spy photos of the upcoming car. The two-seat coupe is codenamed C190 and will take the place of the bigger SLS AMG.

Concept Car of the Week: Porsche Tapiro (1970)

By the late 1960s it was time for Porsche to create a new car that would replace its ageing entry-level model, the 912. Its sister company Volkswagen also needed a sports coupe to replace the Karmann Ghia and so the two brands joined together to develop what would become the Porsche 914. These days the 914 holds something of a ‘cool factor', generally considered as the ‘black sheep' in Porsche history.