Taken From:
SeriousWheels.com From the Tomahawk specs here is the Viper engine specifications:
ENGINE: 8.3-LITER, OHV, 20-VALVE SMPI V-10
Type and Description: 10-cylinder 90-degree V-type, liquid-cooled
Displacement: 505 cubic inches (8277 cc)
Construction: 356-T6 aluminum alloy block with cast-iron liners, aluminum alloy cylinder heads
Bore x Stroke: 4.03 inches x 3.96 inches (102.4 x 100.6)
Valve System: Two pushrod-actuated overhead valves per cylinder
with roller-type hydraulic lifters
Fuel Injection: Sequential, multi-port electronic with individual runners
Compression Ratio: 9.6:1
Power (SAE net): 500 bhp (372 kW) @ 5600 rpm (60.4 bhp/liter)
Torque (SAE net): 525 lb.-ft. (712 Nom) @ 4200 rpm
Max Engine Speed: 6000 rpm
Fuel Requirement: Unleaded premium, 93 octane (R+M/2)
Oil System: Dry Sump
Oil Capacity: 8 qts. Mobil1 10W30 Synthetic
Cooling System: Twin aluminum radiators mounted atop engine intake manifolds, force-fed from front-mounted, belt-driven turbine fan
Coolant Capacity: 11 qts.
Exhaust System: Equal-length tubular stainless steel headers with dual collectors and central rear outlets
EDIT: Mis information on my part. Corrected.