This fine example of the 304-R Rouse Sport model is build number “29 of 100” (which actually topped out at 78) and was completed on the 18th of October 1990.

A fair number of owners followed but the mileage has remained impressively moderate for the age of the Cosworth.

The previous owner acquired the Sapphire in December of 2018 with the odometer standing at a shade of over 85,000 miles at that time.

Current owner, Darren, acquired the Sierra Sapphire Cosworth at auction in September of 2025 to become its 12th registered keeper.

Just 86,100 miles were recorded at that time with today’s total standing at just 86,423, equating to just under 2,500 miles per year on average.

In previous ownerships a raft of performance improvements has been wrought to further augment the original’s 260bhp and 300 Ib-ft of torque.

These upgrades include DB10 camshafts; a T34 stage 3 hybrid turbo; a Group A head gasket; a Collins Performance stage 3 chip and board; a 3-bar map sensor and Grey 403 inje...