For the last year of production, Porsche increased the GS engine to 1588cc and that meant the power rose to 105bhp.
Engine: Rear-mounted, air-cooled flat-four with double overhead camshafts and two Solex 40 PII downdraft carburettors
Compression ratio: 9.5:1
Bore and stroke: 87.5x66mm
Maximum power: 105bhp at 6500rpm
Maximum torque: 121Nm at 5000rpm
Transmission: Four speed manual driving the rear axle
Brakes: Front: 280x40mm drums; rear: 280x40mm drums
Suspension: Front: Two swinging arms with two transverse torsion bar springs, telescopic dampers and anti-roll bar; Rear: Swing axles with torsion bar springs and telescopic dampers
Wheels & tyres: Front: 4.5Jx15 with 5.90/15 tyres 4.5Jx15 with 5.90/15 tyres
Top speed: 125mph
The 1600GS Carrera de Luxe was available in Coupe, Cabriolet, Hardtop-Coupe and Hardtop/Cabriolet forms.