Dyno-testing this little jewel of an engine was a real pleasure and a privilege for us. This OSCA MT4 engine was a stock rebuild for a ground up restoration of an early 1960s Fiat OSCA 1500 convertible. The most surprising result was the excellent torque of the engine, especially considering the relatively low compression ratio used. A period road test from Road & Track magazine noted the smooth torque and good acceleration of this car. The header design was ahead of its time as well, with a nice and efficient 4-2-1 design that was sure to boost the torque output. Originally this OSCA MT4 engine was designed as a racing power plant so the cylinder head probably flows pretty well, in turn contributing to the notable output. The Fiat OSCA cars are under-appreciated today, but in their heyday were considered equals to the very successful Alfa Romeo race cars that they shared the track with.

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Power: 93.6-hp @ 5,200-rpm, 101 lb/ft@ 4,600-rpm

Type: Fiat OSCA MT4 1500 4-cylinder
Bore: 78-mm
Stroke: 78-mm
Compression Ratio: 8;6:1
Cylinder heads: Aluminum DOHC
Camshafts: Standard OSCA
Induction: Single Weber 2-barrel carburetor
Exhaust: Factory tubular headers
Ignition: Points distributor