400R

400R can refer to:


 * Allison World 400R, a transmission built for transit buses by Allison Transmission
 * Goodyear GA-400R Gizmo, a helicopter developed by Goodyear
 * Honda XR 400R, an off-road motorcycle produced by Honda
 * Kawasaki Ninja 400R, a 2011 sport bike manufactured by Kawasaki
 * Nismo 400R, a special edition variation of the Nissan Skyline R33
 * Privia PX-400R, a digital piano manufactured by Casio