Audi is revving up to launch a smaller sibling for its R8 super car, which could be badged the R4.
If it makes production the mid-engined R4 will rival sports cars such as the Porsche Boxster.
topCar magazine reports that the entry-level R4 will get the VW/Audi group's 2-litre turbo FSI engine. However, power will be increased to 201 kW.
The RS model will have a 2.5-litre in-line five turbocharged to produce 260 kW.
Audi is developing a brand new platform for the R4 while the transmission, steering and brakes will come from the existing parts bin.
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According to topCar the R4 would not use lightweight aluminum like the R8 and TT. Audi will use a high-strength steel spaceframe for the chassis, with hang-on body panels made of plastic and aluminum.
Apparently kerb weight could be between 1 100 and 1 250 kg.
Production for the R4 is expected to kick off at the end of 2009.
