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

One Lap of the Web: Elon Musk's Hyperloop, Greenwich Concours and a Model T

We spend a lot of time on the Internet -- pretty much whenever we're not driving, writing about or working on cars. Since there's more out there than we'd ever be able to cover, here's our daily digest of car stuff on the Web you may not otherwise have heard about. The 2013 Porsche Rennsport Australia went off over Memorial Day weekend at Sydney Motorsports Park and motorsportretro.com has full gallery of pictures.

BMW M3 Convertible (2008): first official pictures

By Stephen Dobie First Official Pictures 18 January 2008 15:08 The M3 family has swelled further with BMW’s announcement of the new convertible version - and a twin-clutch gearbox. This is the first M3 with a folding metal hardtop, and the first with BMW's new transmission. It's a new seven-speed gearbox called M DCT gearbox – a double-clutch affair (like VW's seven-speed DSG) allowing near-instant changes, with little drop in power.

Report Claims Pothole Repair Blackhole Is £12bn

FIGURES from the Asphalt Industry Alliance (AIA) have revealed the extent of the nation’s pothole crisis, with a report claiming the "catch-up" cost of getting roads back into reasonable a condition has soared to £12 billion. The total is an increase on the £10.5 billion figure reported last year, and remains high despite more than two million potholes being filled in England and Wales over the last 12 months. This was despite a 20% decrease in the shortfall in annual road maintenance budgets reported by local authorities, with the shortfall reducing from an average of £6.2 million to £5.1 million per authority in England.