Let’s cut through the chrome: if you buy the Bonneville T40 for the speed, you’re paying ₹44,672 for a headache. The Speed 400 makes 36.4 hp at 8,500 rpm. The T40 manages 28.6 hp at 7,000 rpm. That’s an 8 hp deficit on a bike that costs nearly half a lakh more. On paper, the Speed 400 is the superior machine. It’s lighter, faster, and sharper. So why does the T40 exist?
It’s not about the engine; it’s about the electronics. That extra cash buys a 4-inch circular TFT display with turn-by-turn navigation, cruise control, and five distinct riding modes. The Speed 400 sticks with an analogue-plus-digital cluster and basic ABS. The T40 adds lean-sensitive ABS, traction control, an emergency deceleration warning, and a USB-C charger. These aren’t gimmicks. For a rider covering 100+ km daily, cruise control and navigation cut fatigue significantly. The T40 is a commuter-tourer hybrid. The Speed 400 is a pure sport-commuter.
Handling tells the rest of the story. The T40 weighs 195 kg. The Speed 400 is 179 kg. That 16 kg difference isn’t negligible. The T40 uses 18-inch spoked, tubed wheels up front. A puncture on a spoked wheel is a hassle. A puncture on the Speed 400’s 17-inch alloy wheel is a quick fix. The T40’s 43 mm conventional fork is fine for city potholes, but the Speed 400’s upside-down fork and four-piston radial caliper on the 300 mm front disc offer superior braking stability and cornering confidence. The T40’s 310 mm disc is larger, but the caliper setup isn’t as aggressive.
Comfort is where the T40 wins. The seat height is 790 mm, 13 mm lower than the Speed 400’s 803 mm. An accessory low seat brings the T40 down to 770 mm. The 14.5-litre tank adds range over the Speed 400’s 13 litres. Both bikes service every 12 months or 16,000 km. The Speed 400 includes a two-year unlimited-km warranty, a slight edge in long-term ownership peace of mind. Choose the Speed 400 if you want to feel the road and push the limits. Choose the T40 if you want to arrive relaxed with directions on screen and cruise control engaged.