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

Video: The Porsche Panamera Sport Turismo concept build process

Porsche has released a video featuring Style Director Michael Mauer charting the design process of the Panamera Sport Turismo concept. The 10-minute YouTube video, which also features General Manager Advanced Design Style Mitja Rorkert, follows the build process through each modeling phase right up until the presentation of the show car at this year's Paris motor show. "It always presents a special challenge when we develop a new kind of car for the Porsche brand," says Mauer, "precisely because we haven't been in the segment before, and the question of whether it matches the Porsche brand always looms in the background." We were impressed at the Panamera Sport Turismo concept's unveiling, particularly with its stance and detail execution, so the video is a chance to see just how this concept came into being.

McLaren P1 back at the Nurburgring in attack mode

The McLaren P1 is back at the Nurburgring looking to set a new record It was brave of Ron Dennis to declare – before the McLaren P1 was anywhere close to finished – that the it would be able to lap the Nurburgring in under 7 minutes. He was obviously very confident his new baby was up to the task but, just like McLaren’s current Formula One car, the P1 seems to be just a bit off the pace. Last month we reported that it seemed the best the McLaren P1 could do at the Nurburgring was a 7:04s – a time McLaren didn’t make official – so we knew McLaren would be back with their laptops and engineers as soon as they’d figured a way to trim those last few seconds.

Alfa Romeo 4C hits the track (video)

The Alfa Romeo 4C (pictured) out on track – on video The Alfa Romeo 4C has been on its way for longer than it should have been. But Alfa Romeo finally got round to revealing the 4C in prodiction spec at the Geneva Motor Show in March, and visitors to this year’s Goodwood Festival of Speed later this month will get to see the 4C strutting its stuff up the hillclimb. But ahead of that dynamic debut, Alfa has released new video of the 4C out playing on the Balocco Racetrack in Italy, with a few wailing exhausts notes but far to much dramatic music as a soundtrack.