5.2L V10 FSI 435-450 hp

This engine is a derivative of the Gallardo's Lamborghini V10 developed under the VAG era. It has been bored by an extra two millimeters, and shares the 90° angle of the recent Audi V engines. Audi continue to use the FSI technology in the Le Mans R8 sport cars. A 550 hp (410 kW) 5.5L version will be used in the upcoming Audi Q7 and the Audi RS6. A 600 hp (450 kW) bi-turbo V10 will power the Audi R8 Road Car according to WorldCarFans

Configuration
5204 cm3 90°V10
Cylinders
Bore × stroke 84.5 mm × 92.8 mm (0.91 ratio), 520.4 cc/cylinder, 90 mm spaced, 18.5 mm bank offset
Crankcase
low-pressure die-casting hypereutectic aluminum alloy reinforced by a bedplate frame, inner-vee balancing shaft eliminating first degree inertial forces, grey cast iron bearings
Crankshaft
18 degrees crankpin offset
Head
4 valves per cylinder, DOHC, 12.5:1 Compression ratio, chain driven camshafts continuously adjusted on 42 degrees, roller cam followers valve actuation, 32.5 mm intake valves and 28.0 mm exhaust sodium-filled valves
Fuel system
common rail FSI petrol direct injection, maximum injection pressure of 100 bar, Bosch Motronic MED 9.1 management
Aspiration
two-stage magnesium variable intake manifold incorporating electronically controlled tumble flaps inducing a swirling movement in the drawn air
Exhaust
four close-coupled catalytic converters
Dimensions
220 kg (20 kg less than the competition, i.e. the BMW S85), length 685 mm, width 801 mm, height 713 mm high with all components, the engine only is 560 mm long
Output
320 kW (435 hp) @ 6800 rpm, 540 N·m from 3000 to 4000 rpm, over 500 N·m between 2500 and 5500 rpm in the S6 and S6 Avant
331 kW (450 hp) @ 7000 rpm, 540 N·m @ 3500 rpm (90% available from 2,300 rpm), 21.7 m/s maximum piston speed, 13,04 bars maximum MEP in the S8
375 kW (510 hp) @ 7600 rpm, 540 N·m @ 4500 rpm, 23.5 m/s maximum piston speed, 13,14 bars maximum MEP in the R8
Applications
Audi S8, Audi S6 and S6 Avant
references
Audi AG (2005-10-19). New Audi S8. Press release.
Audi AG (2005-12-02). New Audi S8 In Depth. Press release.