There is no Classic 250 on the Royal Enfield lineup. The smallest engine in the Classic series comes in the Classic 350. There is a segment difference between the Bajaj Dominar 400 and the Royal Enfield Classic 350. The Dominar 400 has a 373.3cc single-cylinder liquid-cooled fuel-injected engine that produces a maximum power of 34.5 hp at 8,000 rpm and a peak torque of 35 Nm at 6,500 rpm. While on the other hand, the Classic 350 has a 346cc single-cylinder engine that produces a maximum power of 19.8 hp and a peak torque of 28 Nm. If you were to compare the power figures solely, the Dominar 400 will come out on the top.