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

New Porsche Cayenne Turbo S (2013) arrives

Porsche has revealed the 2013 Cayenne Turbo S, the range topping Cayenne with an extra 50bhp and a £107.5k price tag. The 2013 Porsche Cayenne Turbo S has been revealed with a few subtle cosmetic changes and an extra 50bhp and 37lb/ft of torque to add to the Cayenne Turbo’s 500bhp and 516lb/ft. Porsche has released the extra 50 horses in the Turbo S by making the inlet manifold more-free flowing, turning up the boost a bit and plugging in their laptops to have a fiddle, the result of which is a 0-62mph of 4.5 seconds and a top speed 3mph more.

Sir Stirling Moss, 81, retires from racing

While participating in a live interview with Joe Bradley of RadioLeMans.com on Thursday, Sir Stirling Moss announced his retirement from the sport that he loves. "This afternoon I scared myself, and I have always said that if I felt I was not up to it or that I was getting in the way of fellow competitors, then I would retire," Moss said. Moss is one of the most recognizable figures in motorsports, with a career that has spanned more than 60 years.

Porsche Boxster Spyder (2010) – UK details and prices

Porsche has released UK details for the Porsche Boxster Spyder Back in November we reported that Porsche had revealed the Porsche Boxster Spyder, a stripped down Boxster with an iconic ’Speedster’ profile. To be honest, we were surprised they didn’t go with the Speedster name (we reported back in Spetember with pictures of a Porsche Boxster with Speedster humps testing at the Nurburgring), but perhaps that was a step too far; using the Speedster tag on a lowly Boxster. But no matter, the Porsche Boxster Spyder it is with the flat six 3.4 litre engine with 310bhp and a 0-60mph of 4.6 seconds when you tick the PDK Sport Chrono Plus option.