<P> Chevrolet has been the most successful manufacturer as of August 2015, with 749 race wins and 38 manufacturers championships . Ford ranks second with 636 victories and 15 manufacturers championships . Dodge is third in wins with 217, Plymouth fourth with 190, and Pontiac fifth with 155 . Toyota currently ranks 9th all time, with 74 victories . </P> <P> Cup Series cars (often called "Cup cars") adhere to a front engine rear - wheel - drive design . A roll cage serves as a space frame chassis and is covered by a 24 - gauge sheet metal body . They have a closed cockpit, fenders, a rear spoiler, and an aerodynamic splitter . Fielding a car for one season usually costs $10--20 million . Each team may build its own cars and engines (per NASCAR's specifications) or purchase cars and engines from other teams . </P> <P> The cars are powered by EFI V8 engines with compacted graphite iron blocks and pushrod valvetrain s actuating two - valves per cylinder, and are limited to 358 cubic inches' (about 5.8 liters) displacement . However, modern technology has allowed power outputs near 900 horsepower (670 kW) in unrestricted form while retaining the conventional basic engine design . In fact, before NASCAR instituted the gear rule, Cup engines were capable of operating more than 10,000 rpm . A NASCAR Cup Series engine with the maximum bore of 4.185 inches (106.3 millimeters) and stroke of 3.25 inches (82.55 millimeters) at 9,000 rpm has a mean piston speed of 80.44 fps (24.75 m / s). Contemporary Cup engines run 9,800 rpm, 87.59 fps (26.95 m / s), at the road course events on Pocono Pennsylvania's long front stretch and at the . 526 - mile short - track Martinsville Speedway . At the backbone 1.5 - to 2.0 - mile tri-oval tracks of NASCAR, the engines produce over 850 hp running 92--9400 rpm for 500 miles, 600 mi for the Coca - Cola 600 Charlotte race . </P> <P> The front suspension is a double wishbone design, while the rear suspension is a two - link live axle design utilizing trailing arms . Brake rotors must be made of magnetic cast iron or steel and may not exceed 12.72 inches (32.3 centimeters) in diameter . The only aerodynamic components on the vehicles are the front splitter, spoiler, NACA ducts in the windows only, and side skirts . The use of rear diffusers, vortex generators, canards, wheel well vents, hood vents, and undertrays is strictly prohibited . While the cars may reach speeds of about 200 mph (321.8 km / h) on certain tracks, Russ Wicks drove a stock car built to NASCAR's specifications 244.9 mph (394.1 km / h) during a speed record attempt at the Bonneville Salt Flats in October 2007 . </P>

What kind of engines are in nascar cars