It might look like a new car but all Triumph did was get Karmann to reshape the front and rear panelwork in a more modern style. The doors and windscreen are still TR4. Wider wheels are now more commonly steel with chrome trim rings, and the seats have a bit more padding, but under the bonnet things continued as with the TR5/TR250, with a fuel-injected 150bhp for most of the world and 104bhp with carbs for the US, where most were sold. That differential was reduced in 1972 when the injected cars’ output was cut to 125bhp to aid refinement, and US cars were re-rated at 106bhp.
info from Octane