Two V8 engines were offered initially, a high-revving 4,719 cc (4. 7 L; 288. 0 cu in) and a higher torque 4,930 cc (4. 9 L; 300. 8 cu in); a US smog-qualified 4. 9-litre engine was used (a stroked version of the 4. 7), starting with 1973 deliveries. The 4. 7 L V8 produces 310 hp (231 kW; 314 PS) at 6,000 rpm and 325 lb⋅ft (441 N⋅m) of torque at 4,200 rpm. Eventually, production switched to only using a more powerful version of the 4. 9-litre engine producing 320 hp (324 PS; 239 kW) at 5,500 rpm and 454 N⋅m (335 lb⋅ft) of torque at 4,000 rpm. All these engines traced their lineage back to the famous 450S racecar, were aluminium alloy, had hemispherical combustion chambers with 16 valves total operated by four cams (chain-driven). Both engines were mounted longitudinally in the middle of the car and were mated to a ZF-1 five-speed transaxle sending power to the rear wheels. They were fed by four 42 DCNF/14 downdraught Weber carburetors with Bosch electronic ignition. The compression ratio is 8. 5:1.