The 2010 Audi R8 has a V8 engine.
The 2014 Audi R8 has a V8 engine.
The 2011 Audi R8 has a V8 engine.
The 2009 Audi R8 has a V8 engine.
The 2008 Audi R8 has a V8 engine.
The 2012 Audi R8 has a V8 engine.
The R8 haves an V8 engine wheres the R8-V10 haves a V10 engine which is more powerful, the r8-v10 also haves minor changes on the design :)
Audi r8
The 2010 Audi R8 has a 4.2 L base engine size.
The 2012 Audi R8 has a 4.2 L base engine size.
The 2008 Audi R8 has a 4.2 L base engine size.
The 2009 Audi R8 has a 4.2 L base engine size.