TECHTONICS: Ten To Go
The R8's new 5.2-liter V-10 descends from the collaborative design effort between Audi and Lamborghini, which yielded a 493-hp, 5.0-liter V-10 for the 2004 Gallardo. The 90-degree V-angle, selected to facilitate the sharing of block machining tools with Audi V-8 engines, results in uneven firing intervals. Boosting the displacement to 5.2 liters, installing direct fuel injection, and raising the compression ratio to 12.5:1 in the R8 yields 391 lb-ft of torque at 6500 rpm and 525 hp at 8000 rpm. A similar 5.2-liter V-10 in the Lamborghini Gallardo LP560-4 boasts slightly higher peak power and torque ratings.
- Don Sherman, Technical Editor