2009 BMW Z4 caught testing at the Nurburgring

The next generation BMW Z4 will be launched as a 2010, and according to the latest spy video the car will grow both in size, but also in price. It will feature the same shape to the current Z4 but will feature a new folding hardtop in lieu of the current fabric roof.

Under the hood there will be both twin-turbo and naturally-aspirated straight six engines; while the flagship M Roadster is likely to get a brand new high-performance turbo six with around 350hp.