Champ Car TOP SPEED Approx. 240 mph HORSEPOWER Approx. 750 FUEL Methanol TRACTION CONTROL Not Allowed

Engine: Turbocharged, 2.65-liter (161.703 cubic inch) V-8 Gearbox: Manual with six or seven forward gears Tires: Ungrooved racing "slicks" manufactured by Bridgestone. Front: 10 inches max. width; Rear: 14 inches max. width Wheelbase: Between 124 and 128 inches Min. Weights: 1,565 pounds (1,540 pounds at super speedway events) including coolant and lubricant, without driver Max. Height: 32 inches, excluding the roll-over hoop and rear wings for short ovals/road courses Max. Width: 78.5 inches

Formula One Car TOP SPEED Approx. 225 mph HORSEPOWER Approx. 830 FUEL Unleaded racing gasoline TRACTION CONTROL Allowed

Engine: Normally-aspirated, 3-liter (183 cubic inches) V10 Turbochargers are forbidden Gearbox: Semi-automatic with six to seven forward gears Tires: Grooved racing "slicks". Front: 13.98 inches max. width; Rear: 14.97 inches max. width Wheelbase: Between 120 and 130 inches Min. Weights: 1322.77 lbs with driver Max. Height: 37.43 inches Max. Width: 70.87 inches

NASCAR Stock Car TOP SPEED Approx. 200 mph HORSEPOWER Approx. 700 FUEL Racing Gasoline TRACTION CONTROL Not Allowed

Engine: Normally-Aspirated, 358 cubic inches V-8 Gearbox: Manual Tires: Ungrooved Racing "slicks" Wheelbase: 110 inches Min. Weights: 3400 lbs. without driver Max. Height: 51 inches Max. Width: 79 inches

IRL Car TOP SPEED Approx. 230 mph HORSEPOWER Approx. 650 FUEL Methanol TRACTION CONTROL Not Allowed

Engine: 3.5-liter V8, 32-valve dual-overhead cam (DOHC), Normally aspirated Gearbox: XTRAC gearbox (standard), six forward gears, sequential shifter Tires: Bridgestone/Firestone Wheelbase: 110 inches minimum (hub to hub) Min. Weights: 1,550 pounds minimum, including all lubricants and coolants used during the event, but does not include fuel or driver Max. Height: Approximately 38 inches Max. Width: 78.5 inches (outside wheel rims) maximum, 74 inches minimum (measured at the hub centerline)

Illustrations by Jim Kasper