| Austin Twelve engine 4 | |
|---|---|
 Austin 12/4 taxicab | |
| Overview | |
| Manufacturer | Austin |
| Layout | |
| Configuration | Straight 4-cylinder[1] |
| Displacement | 1,861 cc (114 cu in)[1] |
| Cylinder bore | 72 mm (2.8 in)[1] |
| Piston stroke | 114.5 mm (4.51 in)[1] |
| Cylinder block material | Cast iron, alloy crankcase. The inlet manifold is cast in one with the cylinder head[1] |
| Cylinder head material | Detachable, pistons are aluminium[1] |
| Valvetrain | Side-by-side valves, tappet covers may be easily removed, timing is driven by chain[1] |
| Combustion | |
| Fuel system | Single carburettor supplied by a vacuum tank which draws from a reservoir beneath the driver's seat, ignition by magneto driven by chain placed behind the timing, dynamo driven by same chain[1] |
| Fuel type | Petrol[1] |
| Oil system | Lubrication by forced feed, filler on the offside[1] |
| Cooling system | Radiator, fan, cooling water is circulated by a pump forward of the timing on the nearside[1] |
| Output | |
| Power output | 27 bhp (20 kW; 27 PS) @2,000 rpm Tax horsepower 12.8[1] |
| Chronology | |
| Successor | Austin Twelve |
The Austin London Taxicab used a modified Austin Heavy Twelve-Four chassis clothed with new bodies designed by London's largest taxicab retailer and dealer Mann & Overton, and made for them by London coachbuilders.