Triumph makes all sorts of bikes - sports, retro, cruisers, and the Rocket III. If you didn't know already the Rocket III is a cruiser, but not in the Harley Davidson mould (more noise than power). Rocket III has a 2.3 litre 3 cylinder engine with 140bhp and 150lb ft of torque. Which is enormous for a machine weighing 320kg.
And because it's a cruiser the weight is long and low, so it can wheelspin off the line. Just like in this video produced by Triumph themselves. Simple, brutal power. Sometimes you just can't beat it.