1968-1970 Closed Emissions Oil Cap (black) on 2040-parts.com

Alfa Romeo 4C spied in Michigan

During the Detroit auto show in January, Fiat and Chrysler CEO Sergio Marchionne told us -- in his own irreverent way -- that arrival of the long-promised Alfa Romeo 4C would be delayed once again. But as these spy photos show, testing on the sporty coupe continues even as a debut date remains elusive. This isn't the first time we've caught the 4C testing in the States.

Citroen Survolt (2010) at the Geneva motor show

Citroen had a genuine surprise at the 2010 Geneva motor show – the sleek Survolt sports car concept. Well, the pair shared the same rotating plinth on Citroen’s stand but that’s about it. Whereas the Revolte concept (revealed at the 2009 Frankfurt motor show) was a plug-in hybrid supermini, the Survolt is an all-electric sports car.

Porsche Macan caught on video

The Porsche Macan – a Porsche Cayenne on a boil wash – has been spied out testing and caught on video. We’ve seen spy photos of the Porsche Macan before – Porsche’s take on the Audi Q5 – and they look more like a cut down Cayenne being used as a mule for the Macan’s underpinnings than an actual Macan. But it seems that the shots so far are actually the Macan as it’s heading for production, which means Porsche has, perhaps unsurprisingly, chosen the 911 school of car design as its inspiration for the Macan and just stuck a Cayenne on a boil wash.