Porsche’s long-running 911 arrived in 1964, replacing the 356.

The latter’s rear-engined layout was retained, but the 911 switched to unitary construction for the body shell and dropped the 356’s VW-based suspension in favour of a more modern McPherson strut and trailing arm arrangement.

In its first incarnation, Porsche’s single-overhead-camshaft, air-cooled flat six displaced 1,991cc and produced 130bhp; progressively enlarged and developed, it would eventually grow to more than 3 litres and, in turbo-charged form, put out well over 300 horsepower.

The first of countless up-grades came in 1966 with the introduction of the 911S.

Easily distinguishable by its stylish Fuchs five-spoked alloy wheels, the ‘S’ featured a heavily revised engine producing 160bhp, the increased urge raising top speed by 10mph to 135mph.

The 911T was added to the Porsche line up in 1968 as the “Touring” form of the 911.

It had the 2.0-litre engine, but with a performance output of 110bhp.

The T was the ...