This was the most powerful 356B with, as its name suggest, an output of 90bhp – thanks mainly to an increased compression ratio and the use of two twin-choke Solex carburettors.
Visually, it was upgraded in line with the entry-level B; the front bumper and headlamps were higher, while the indicators lenses protruded further and the handle on the bonnet became wider. New vents under the front bumper fed air to the brakes.
Engine: Rear-mounted, air-cooled flat-four with two Solex 40 PII-4 twin-choke downdraft carburettors
Compression ratio: 7.5:1
Bore and stroke: 82.5x74mm
Maximum power: 90bhp at 5500rpm
Maximum torque: 121Nm at 4300rpm
Transmission: Four speed manual driving the rear axle
Brakes: Front: 280x40mm drums; rear: 280x40mm drums
Suspension: Front: Two swinging arms with two transvers torsion bar springs, telescopic dampers and anti-roll bar; Rear: Swing axles with radius arms, two torsion bar springs and telescopic dampers. Compensating spring.
Wheels & tyres: Front: 4.5Jx15 with 5.60/15 tyres 4.5Jx15 with 5.60/15 tyres (optional radial tyres: 165/15)
0-60mph: 13.5 sec
Top speed: 112mph
The 356B 1600 Super 90 was offered in Coupe, Cabriolet Hard-top Coupe (Cabriolet with a hardtop welded in place) Hardtop/Cabriolet (Cabriolet with a removable hardtop) forms.