Aston Martin Straight Six Engine
- Wikipidier (talk) 22:50, 21 February 2021 (UTC)The Lagonda engine was used between 1948 and 1959, it was a Lagonda engine based in a Bentley design. The new Aston Martin engine was a new engine design by Tadek Marek to replaced the older design.
| Aston Martin Straight Six Engine | |
|---|---|
 Engine in Aston Martin DB4 S1 | |
| Overview | |
| Manufacturer | Aston Martin Lagonda Limited |
| Designer | Tadek Marek |
| Production | 1958 - 1973 |
| Layout | |
| Configuration | Inline-6 / Straight 6 |
| Displacement | 3,670 cc or 3,995 cc |
| Cylinder bore | 3.7 L - 92 mm 4.0 L - 96 mm |
| Piston stroke | 92 mm |
| Block material | Aluminium alloy |
| Head material | Aluminium alloy |
| Valvetrain | 2 valves / cylinder, DOHC, duplex chain-drive |
| Compression ratio | 8.8/1 to 9.4/1 |
| Combustion | |
| Fuel system | Twin / Triple Carburetors, AE Brico Fuel Injection |
| Fuel type | Petrol |
| Oil system | Wet sump |
| Cooling system | Water-cooled |
| Chronology | |
| Predecessor | Lagonda Straight-6 |
| Successor | Modified Jaguar AJ6 engine Aston Martin V8 engine |
In 1958 Aston Martin launch the new DB4 with a new straight six engine, designed by Tadek Marek. The new engine initially in 3.7 L version, was a DOHC head, with cylinder head and block of cast aluminium alloy[1]. It developed 243 PS (179 kW) with twin SU carburetors. Sources say the engine was prone to overheating in the first (early) engines. The engine continue to be developed, passing to using triple carburetors, compression ratio raised, this changes make the engine reach 318 PS (234 kW) in the most strongest version.
A new development came in 1963, with 4.0 L (3996 cc) displacement, with triple carburetors SU or Weber. In 1969 came another version with fuel injection version used in DB6[2]. The last iteration of this engine was used in DBS, being replaced by a modified version of Jaguar AJ6 engine.
Engine list[edit]
| Engine | Displacement | Power@rpm | Torque@rpm | Year | Features | Applications |
|---|---|---|---|---|---|---|
| 3.7 L | 3,670 cc (244 cu in) | 179 kW (243 PS) @ 5,000 | 320 N·m (240 lb·ft) @ 4200 rpm | 1958-1964 | 2 SU HD8 carburettors | Aston Martin DB4(58-63), Lagonda Rapide(61-64) |
| 3,670 cc (244 cu in) | 234 kW (318 PS) @ 6,000 | 377 N·m (278 lb·ft) @ 5400 rpm | 1959-1963 | 3 Weber 45 DCOE4 carburettors, C/R raised to 9.7/1 | Aston Martin DB4 GT Zagato | |
| 3,670 cc (244 cu in) | 225 kW (306 PS) @ 6,000 | 366 N·m (270 lb·ft) @ 5000 rpm | 1959, 1961-1963 | 3 Weber carburetors, C/R raised to 9.1/1 | Aston Martin DB4 GT, Vantage GT(61-63) | |
| 3,670 cc (244 cu in) | 198 kW (270 PS) @ 5750 | 346 N m (255 lb ft) @ 4500 rpm | 1961-63 | 3 SU HD8 carburettors, 9.1/1 | Aston Martin DB4 Vantage | |
| 4.0 L | 3,996 cc (244 cu in) | 210 kW (286 PS) @ 5,500 | 370 N·m (273 lb·ft) @ 4500 rpm | 1963-72 | 3 SU HD8 carburettors, C/R 8.9/1 | Aston Martin DB5, Volante(65), Lagonda (64), DB6(65-70), DB6 Volante(67-70), DBS(68-72) |
| 3,996 cc (244 cu in) | 242 kW (330 PS) @ 5500 rpm | 390 N m (288 lb ft) @ 3850 rpm | 1964-73 | 3 Weber 45 DCOE9 carburettors | Aston Martin DB5 Vantage, Vantage Volante(65-70), DB6 Vantage(65-70), DBS Vantage(72-73) | |
| 3,996 cc (244 cu in) | 242 kW (330 PS) @ 5750 rpm | 393 N m (290 lb ft) @ 3850 rpm | 1969 | AE-Brico fuel injection, C/R 9.4/1 | DB6 MkII (69); Optional version (46 build) |
References[edit]
- ↑ Aston Martin: Power, Beauty and Soul; 2nd edition. Images Publishing Dist Ac. June 21, 2017. ISBN 978-1864707304. Search this book on
- ↑ The Aston Martin Story. The History Press. November 1, 2012. ISBN 978-0752471334. Search this book on
External Links[edit]
See also[edit]
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