The next-generation BMW Z4 has been snapped in prototype form and will feature quite a few new additions.
The biggest addition is perhaps the inclusion of a folding metal roof. On new Z4, BMW will seemingly abandon a cloth roof and follow its 3 Series convertible cousin, and rival Mercedes-Benz SLK with a retractable metal roof.
Z4's range will also feature a host of new engines, including the twin-turbocharged 3.0-litre straight six being used in a variety of applications across the BMW model spread. There's a possibility that Z4 could also become available with diesel power for the first time.
M3's 4.0-litre V8 could also be shoehorned into the flagship M model. The car also shares its platform with the current 3 Series.
All cars, in Europe at least, will benefit from BMW's Efficient Dynamics programme, which helps to reduce CO2 emissions and boost fuel economy.
Sales for the next generation Z4 should start in 2009.