The Opperman Stirling was a microcar built between 1958 and 1959, only two were ever made.

It was much more stylish than the Unicar, the first had a larger 424cc 25 bhp (19 kW) Excelsior engine and the second had a Steyr 500cc unit.

The brakes were now hydraulic and the rear wheels further apart. The launch of the Mini in 1959 wiped out the rationale for the Opperman and the Stirling never went into full production.