Volkswagen versions originally featured the fuel-injected 1.7 L VW Type 4 flat-four engine producing 80 bhp (60 kW; 81 PS).

Porsche's  914/6 variant featured the 2.0 L air-cooled Type 901/3 flat-six engine from the 1967–1969 911T model.
This was the least powerful flat-six in Porsche's lineup.
This engine had revised pistons that reduced the compression ratio to 8.6:1.
The cylinder barrels were entirely made of iron, in contrast to the iron and aluminum "Biral" barrels in the engines in the 911S and 911L. New camshafts had less lift, and relaxed timing characteristics.
The venturis in the Weber 40IDT3C carburetors were 27 mm (1.1 in), smaller than the other 911 engines, and the exhaust pipe diameter was also reduced in size.
Power output was 110 bhp (82 kW; 112 PS).
When the 911T got a 2.2 L engine in 1970, the engine in the 914/6 remained at 2.0 L.
All engines were placed amidships in front of a version of the 1969 911's "901" gearbox configured for a mid-engined sports car.
Karmann manufactured the rolling chassis at their plant, completing Volkswagen production in-house or delivering versions to Porsche for their final assembly.

The 914/6 models came with lower gear ratios and larger brakes to compensate for the greater weight and higher power output of the six-cylinder model.
They also featured five lug wheels and an ignition on the left side of the steering wheel.
Suspension and handling were otherwise mostly the same.
A Volkswagen-Porsche joint venture, Volkswagen of America, handled export to the U.S., where both versions were badged and sold as Porsches.
The four-cylinder cars were sold as Volkswagen-Porsches at European Volkswagen dealerships.

For 1973 the discontinued 914/6 was replaced in the lineup by a variant powered by a new 100 bhp (75 kW; 101 PS) 2.0 L, fuel-injected version of Volkswagen's Type 4 engine.

For 1974, the 1.7 L engine was replaced by an 85 bhp (63 kW; 86 PS) 1.8 L, and the new Bosch L-Jetronic fuel injection system was added to American units to help with emissions control.
Volkswagen versions originally featured the fuel-injected 1.7 L VW Type 4 flat-four engine producing 80 bhp (60 kW; 81 PS).
Porsche's  914/6 variant featured the 2.0 L air-cooled Type 901/3 flat-six engine from the 1967–1969 911T model. This was the least powerful flat-six in Porsche's lineup. This engine had revised pistons that reduced the compression ratio to 8.6:1. The cylinder barrels were entirely made of iron, in contrast to the iron and aluminum "Biral" barrels in the engines in the 911S and 911L. New camshafts had less lift, and relaxed timing characteristics. The venturis in the Weber 40IDT3C carburetors were 27 mm (1.1 in), smaller than the other 911 engines, and the exhaust pipe diameter was also reduced in size. Power output was 110 bhp (82 kW; 112 PS). When the 911T got a 2.2 L engine in 1970, the engine in the 914/6 remained at 2.0 L.
All engines were placed amidships in front of a version of the 1969 911's "901" gearbox configured for a mid-engined sports car. Karmann manufactured the rolling chassis at their plant, completing Volkswagen production in-house or delivering versions to Porsche for their final assembly.
The 914/6 models came with lower gear ratios and larger brakes to compensate for the greater weight and higher power output of the six-cylinder model. They also featured five lug wheels and an ignition on the left side of the steering wheel. Suspension and handling were otherwise mostly the same. A Volkswagen-Porsche joint venture, Volkswagen of America, handled export to the U.S., where both versions were badged and sold as Porsches. The four-cylinder cars were sold as Volkswagen-Porsches at European Volkswagen dealerships.
For 1973 the discontinued 914/6 was replaced in the lineup by a variant powered by a new 100 bhp (75 kW; 101 PS) 2.0 L, fuel-injected version of Volkswagen's Type 4 engine.
For 1974, the 1.7 L engine was replaced by an 85 bhp (63 kW; 86 PS) 1.8 L, and the new Bosch L-Jetronic fuel injection system was added to American units to help with emissions control.
Porsche 914