Alvis 12/70
| Alvis 12/70 | |
|---|---|
Type II 12/70 sports saloon | |
| Overview | |
| Manufacturer | Alvis |
| Production | 1937–1940 741 made |
| Assembly | United Kingdom: Coventry, England |
| Body and chassis | |
| Body style | Sports saloon with luggage boot or 4-seater drophead coupé |
| Powertrain | |
| Engine | 1,842 cc OHV I4 |
| Transmission | Single plate clutch, 4-speed centrally changed by a short lever gearbox, synchromesh on 2nd, 3rd and top, half-floating spiral bevel driven axle |
| Dimensions | |
| Wheelbase | 106 in (2,692 mm) track 50 in (1,270 mm) |
| Length | 170 in (4,318 mm) |
| Width | 62 in (1,575 mm) |
| Kerb weight | Saloon 25cwt |
| Chronology | |
| Predecessor | Alvis Firebird |
| Successor | Alvis TA 14 |
| Alvis 12/70 Engine | |
|---|---|
| Overview | |
| Manufacturer | Alvis |
| Production | 1937 to 1940 |
| Layout | |
| Configuration | straight four |
| Displacement | 1.842 L (112.4 cu in) |
| Cylinder bore | 73 mm (2.9 in) |
| Piston stroke | 110 mm (4.3 in) |
| Cylinder block material | three bearing crankshaft pistons aluminium alloy |
| Valvetrain | push-rod operated overhead valves with double springs camshaft driven by a triplex roller chain |
| Combustion | |
| Fuel system | single downdraught carburettor with an air silencer electrical petrol pump |
| Fuel type | petrol |
| Cooling system | forced water circulation thermostatically controlled |
| Output | |
| Power output | 63.5 bhp @ 4,250 rpm Tax rating 13.22hp |
The Alvis 12/70 was announced by Alvis cars in 22 September 1937. It was a four-cylinder sports saloon or 4-seater drophead coupé related to the pricier six-cylinder Alvis Silver Crest.
Technical director and chief designer Smith-Clarke was fully occupied with a new factory to make Alvis's Gnome-Rhone radial engines so the 12/70 was designed by George Lanchester and it proved to be his last automobile design.