ROVER BY TRIUMPH
Q: Is it true that the six-cylinder Rover SD1 engines were really a Triumph design? I’ve just acquired a 2300 project and I’m intrigued by the odd-looking engine.
A: Not as such. It’s said that the Triumph straight-six unit was used as a starting point for the development of an OHC six-cylinder engine for the SD1 but in reality was used only as inspiration. The so-called ‘PE166’ engine as it entered production ended up being very different. The plain black flat-top style of the engine is standard but the engine was a clever design despite problems with the oil restrictor to the top end. In fact it’s reckoned that the 2600 was detuned to avoid competing with the less advanced ex-Buick pushrod V8 engine.