Sauber C4| Constructor | Sauber |
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| Predecessor | Sauber C3 |
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| Successor | Sauber C5 |
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| Chassis | Aluminum Monocoque covered in fiberglass panel body |
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| Suspension (front) | Double wishbones, Coil springs over Dampers, Anti-roll bar |
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| Suspension (rear) | Twin lower links, Single top links, twin trailing arms, Coil springs over Dampers, Anti-roll bar |
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| Engine | Cosworth BDG, 2.0 L (122.0 cu in), L4, DOHC, NA |
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| Transmission | Hewland FGA 400 5-speed manual |
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| Power | 275 hp (205 kW) |
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| Debut | 1973 |
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The Sauber C4 was the fourth sports prototype racing car that Swiss Peter Sauber designed and developed. It was built in 1975. It competed in the European 2-Litre Sportscar Championship, where it managed to score 1 win and 5 podium finishes. It was powered by the same naturally aspirated 2.0 L (120 cu in) Ford-Cosworth BDG four-cylinder engine as its predecessor, developing 275 hp (205 kW).