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

One lap of the web: Porsches going under, best Beetle commercials and Audi clocks

The Hellendorn Rally took place over the weekend in the Netherlands. Driver Harry Kleinjan's Porsche 911 locked up at precisely the wrong moment and ends up all wet. Let's go to the videotape.

Boris planning war on diesel car drivers – London Mayor wants drivers of diesel cars to pay more

Boris wants to charge diesel cars an extra £10 to enter London We’ve long banged on about the nonsense of basing the cost of motoring on the Co2 emissions of cars, and it seems the London Mayor, Boris Johnson, also realises that Co2-based taxation has led to a real pollution problem. As we reported as far back as 2010, petrol cars – certainly before the introduction of Euro 6 emissions recently – are far cleaner than diesel cars when it comes to the sort of stuff that really matters – NoX and particulates. And the problem has been exacerbated by basing car taxation on Co2 emissions as lower Co2 levels have been much easier for car makers to achieve on diesel engines, which is why diesel-engined cars now account for around 50 per cent of all cars sold in the UK.

Concept Car of the Week: Cadillac Sixteen (2003)

Many premium brands struggle to keep their heritage of crafts and aesthetics up to date without often falling into obvious retro references. With a rich tradition of innovation, Cadillac tackled this difficult task in 2003 by creating the stunning Sixteen concept. Its caricature-like proportions exaggerate all the luxury car design codes.