Auto Meter 3911 Sport Comp Silver 5" 10,000 Rpm Tach Tachometer on 2040-parts.com

The 500-hp club: The room is getting crowded

At a time when fuel economy counts for just about everything, there's still a horsepower war raging in the United States. The number of fire-breathing wedge-shaped supercars and hot sedans and coupes that can pump out 500 hp or better has nearly doubled in the past five years to more than 70. A decade ago there were just two members of the 500 hp club in the United States: the Ferrari 575M and Lamborghini Murcielago.

Concept Car of the Week: Audi Quattro Spyder

The Audi Quattro Spyder. It might not be as avantgarde as some concepts we've explored so far in this weekly series becasue this was a sports car designed with production in mind. It would have marked an entry into a market Audi was yet to explore during a time it was deperate to break free of its dowdy, mainstream image.

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.