Engine Power: 1,050 hp (F1) vs. 750-850 hp (NASCAR)

Weight: 1,548 pounds (F1) vs. 3,400 pounds (NASCAR)

Transmission: Semi-automatic, 8 gears (F1) vs. 4-speed manual (NASCAR)

Aerodynamics: Sophisticated systems (F1) vs. restrictive rules (NASCAR)

Tires: Specialized, 13-inch wheels (F1) vs. harder, 15-inch wheels (NASCAR)

Chassis: Carbon fiber monocoque (F1) vs. steel tube frame (NASCAR

Downforce: 5,000 pounds (F1) vs. 2,000 pounds (NASCAR)