The review wraps that engine in a lightweight, compact chassis that resembles an open-wheel race car or oversize go-kart. Project 2&4 weighs a scant 893 pounds (405 kg) and has an extremely low center of mass. The overall footprint is 10 feet long (3,040mm) by 6 feet wide (1,820mm), giving the concept a wide, planted look.

The Honda's RC213V competition motorcycle engine, which we've already seen in action in the RC213V-S sport bike. This is a MotoGP motorcycle racing engine that's been modified to run on public roads. The 2&4's 999cc, four-stroke V-4 boasts a screaming 14,000rpm redline and makes its peak 212 horsepower (215 PS) at an only slightly less lofty 13,000rpm. The engine's 87 pound-feet of torque (118 Nm) is sent to the rear wheels via a six-speed DCT transmission.