Morris Isis Series I
|1955 to 1956|
|Production||1955–1956 8541 made|
|Assembly||United Kingdom Victoria Park, Australia|
|Body and chassis|
|Body style||4-door saloon 2-door estate car|
|Related||Morris Oxford Series II|
|Engine||2.6 L C-Series Straight-6|
|Transmission||4-speed manual optional overdrive|
|Predecessor||Morris Six MS|
The Series I Isis was launched in 1955 as a replacement for the Morris Six MS. It featured a six-cylinder engine, the 2.6 L (2639 cc/161 in³), 86 bhp C-Series unit from the Austin Westminster. Unlike the Westminster, the Isis had a single SU carburettor. The four-speed gearbox had a column change and was available with an optional Borg-Warner overdrive unit.
The car was based on the 4-cylinder Oxford Series II, sharing its almost-unibody shell and torsion bar front suspension. The wheelbase and front end were lengthened to accept the larger straight-6 engine, and a "woody" 2-door estate version was a novelty. With the strong engine, the Isis could reach 90 mph (145 km/h).
Unlike its sister car the Austin Westminster, which enjoyed moderate success against the volume-selling Ford and Vauxhall sixes of the time, sales were poor, with just 8,500 sold.