Primary Chain ​​motor Tralla Bultaco 101, 155, 200 Mondial, Montesa Brio, Ossa 1 on 2040-parts.com

One lap of the Web: $52 million Ferrari 250 GTO, Alfa Romeo Montreal for sale and more bizarro engines

-- Even as the hammer fell on Juan Manuel Fangio's $30 million Mercedes-Benz W196R, we knew that that car wasn't the most expensive one ever sold -- it was merely the most expensive car sold at auction. Other cars were reported to have traded for a bit more in private sales. But now we have word of a car that absolutely blows the sale price of Fangio's little Silver Arrow out of the water: a 1963 Ferrari 250 GTO that sold to an undisclosed buyer for $52 million.

Jaguar F-Type R Coupe unveiled!

When Ian Callum speaks design, it doesn't feel entirely like he's speaking from a teleprompter, listlessly reading from a speech carefully combed over and picked apart by public relations professionals. No, Callum -- 59, and broadly Scottish -- speaks like an old, tenured college professor, a living institution at an institution, as if he's trying to inspire a troubled student. "Cmon," he seems to tell us, "this is how it's done." For Callum, the F-Type Coupe has been an "emotional journey" since he started 15 years ago at Jaguar.

Ralph Gilles talks past, present and SRT future

Ralph Gilles -- SRT boss, Chrysler vice president of design, curator of something called the "Man Van," has become the public face of Chrysler performance, carrying the legacy of Firepower engines and 428 Coronets and the Dodge Viper RT/10 into the future with the Challenger, Charger and Jeep Grand Cherokee SRT8s. Since "unofficially" helping form it in 2003, Gilles has seen SRT transformed into Chrysler's most coherent performance strategy since Plymouth Rapid Transit, a company-wide force so much greater than the flagship Dodge Viper. He was there from the beginning.