| Rover 9/20 | |
| Manufacturer: | Rover |
| Length: | 132inches |
| Width: | 63inches |
| Weight: | 1813lbs |
| Designer: | Jack Sangster |
| Sp: | uk |
| Rover 9/20 | |
| Manufacturer: | Rover |
| Production: | 1924 - 1933 |
| Predecessor: | Rover 8 |
| Successor: | Rover 10/25 |
| Configuration: | straight four |
| Displacement: | 10740NaN0 |
| Bore: | 601NaN1 |
| Stroke: | 951NaN1 |
| Head: | aluminium alloy crankcase |
| Valvetrain: | overhead valves by Duralumin pushrods, chain-driven camshaft |
| Oilsystem: | forced lubrication by a gear pump in the sump |
| Coolingsystem: | water pumped through radiator, no fan |
| Power: | 20bhp @ 3,000 rpm Tax horsepower 8.93 |
| Weight: | 329lbs[1] |
| Designer: | Mark Wild and staff |
The Rover 9 is a small car produced by Britain's Rover car company. It had a 1074 cc 9 fiscal horsepower four-cylinder engine. Manufactured from 1924 until 1927 it was first supplemented then replaced by Rover's 10-12 model.
A Mark Wild and staff designed 1074 cc water-cooled four-cylinder engine with overhead valves announced August 1924[2] supplemented then replaced the Rover 8 air-cooled twin and the new vehicle was named 9/20[3] The new engine with its clutch and gearbox are mounted as a unit to the mainframe at four points.[2] z
Advertised by Rover as "The Nippy Nine" with emphasis on its water coolant circulated by pump, pressure lubricated engine, 3-speed gearbox and silent worm (rear) axle. "Super" models were supplied with rod-operated four-wheel brakes. Steering was by rack and pinion, worm and segment in the more expensive cars. At first the open 4-seater cars had just one door beside the front passenger's seat.[2]
The wheelbase was 104 inches and track 48 inches. The 4-seater sports had a 99-inch wheelbase.[5]
The test car was the sports model with aluminium pistons, double valve springs, higher gear ratios and a lighter body. The car was considered to run pleasantly and do around 60 mph in top gear. When supplied for export the radiator is given a fan. There were complaints about accessibility for servicing and minor repairs. The engine was thought to be unusually smooth for a two-bearing product even at high speed. The steering wheel shook on rough roads otherwise controls were smooth and even. A final comment was "at the price one cannot fairly grumble at three speeds".[6]