Cars Classic 2,0L 1989

Timeless Automobile are proud to present a Ford Sierra Sapphire RS Cosworth 2WD, built to the highest possible standard as a true sleeper: near-standard looks outside, a professionally engineered specification underneath, producing approximately 410 to 485 bhp.

The build was carried out by Bulldozer Srl (Alberto Tiso), a specialist Italian Cosworth engine builder, and purchased and comprehensively transformed on camera by renowned Italian car YouTuber and motoring journalist Davide Cironi. The full teardown, machining, engine build, dyno tuning and road testing were filmed and published, giving this car a complete, public record of exactly what was done and why.

Before the build began, the car was acquired from a single prior owner in remarkably original condition, with matching engine, interior and drivetrain, having been kept as a normal road car rather than a performance one. That original, unmolested starting point is part of what makes the resulting build so significant.



Additional Information
Provenance
● Genuine Sierra Sapphire RS Cosworth 2WD (4-door)
● Acquired from a single prior owner in original, unmodified condition
● Full build documented and published by Davide Cironi
● Built by Italian Cosworth specialist Bulldozer Srl (Alberto Tiso)

Engine
● Complete engine build on the stronger YB "200" (4x4-spec) block
● Reinforced block with long head studs for high-boost reliability
● New forged CPS pistons
● Rebuilt cylinder head with new valves and bronze valve guides
● Custom Colombo & Bariani camshafts
● New timing belt, full gasket and oil seal replacement
● Oil system inspected and refreshed

Turbo & Induction
● Garrett G25-660 turbocharger
● External wastegate and performance blow-off valve
● Larger intercooler and larger aluminium radiator
● Custom intake and intercooler pipework (TBF Performance)
● Upgraded silicone coolant hoses

Fuel & ECU
● Larger high-pressure fuel pump
● ECU remapped with dual boost/dua