The Ninja e-1 has an electric motor while the Ninja 400 has a 399cc parallel twin gas engine.

The e-1 makes over 10 hp while the 400 makes about 45 hp. The 400 has significantly more power.

The electric e-1 offers instant torque. The 400 makes 28 lb-ft of peak torque at higher RPMs.

The e-1 reaches over 80 mph top speed. The Ninja 400 has a top speed around 125 mph.

At under 300 lbs, the electric e-1 is much lighter than the Ninja 400 which weighs about 365 lbs.

The e-1 can hit 60 mph in around 4 seconds. The 400 reaches it in about 5 seconds.

The e-1 takes 4+ hours to fully charge. The 400 just needs gas fill ups.