1974 Aston Martin Lagonda Series I

The Lagonda brand had been moribund for a decade when Aston Martin revived it in 1974 as the model name for a new four-door saloon based on the existing two-door V8. A prototype (‘MP/230/1’) had been used by AML chairman David Brown in 1969 but the project would not come to fruition until after his departure and Aston Martin’s acquisition by Company Developments.

Launched at the London Motor Show in October 1974, the new Lagonda was 305mm (12″) longer in the wheelbase than the two-door V8 whose engine and running gear it shared and to which it bore an understandably strong resemblance. Priced at £14,040, including Purchase Tax, at the time of its launch, the Lagonda cost 24% more than the contemporary V8 and thus was one very expensive motor car. The first example completed was for Aston Martin’s then chairman, William Wilson. Unfortunately, the ongoing Middle East ‘oil crisis’ and other economic woes meant that the market for a 160-mph luxury saloon had declined sharply.

An exclusive model even by Aston Martin standards, the Lagonda was catalogued until June 1976, by which time only seven had been made. Chassis numbers ranged from ‘12001’ to ‘12007’, while a further example – chassis ‘12008’ – was sanctioned at a later date. Of the seven cars built in period, five were completed with automatic transmission (like this example) and only two with the ZF five-speed manual gearbox.

Dimensions & capacities
Length:4928 mm / 194 in
Width:1830 mm / 72 in
Width with mirrors:
Width folded back mirrors:
Height:1350 mm / 53.1 in
Height with roof rails or antenna:
Height full load:
Wheelbase:2915 mm / 114.8 in
Front track:1500 mm / 59.1 in
Rear track:1500 mm / 59.1 in
Powertrain
Engine manufacturer:ASTON MARTIN
Engine type:spark-ignition 4-stroke
Fuel type:gasoline (petrol)
Fuel system:4 carburetors
Charge system:naturally aspirated
Valves per cylinder:2
Valves timing:
Additional features:Weber 42DCNF
Emission control:
Emission standard:
Cylinders alignment:V 8
Displacement:5341 cm3 / 326.8 cui
Bore:100 mm / 3.94 in
Stroke:85 mm / 3.35 in
Compression ratio:9 : 1
Horsepower net:231.5 kW / 315 PS / 310 hp (estimated)
/ 5000
Torque net:500 Nm / 369 ft-lb
/ 4500
Horsepower gross:
Torque gross: 
Redline rpm:
Car power to weight ratio net115.8 watt/kg / 52.5 watt/lb
Car power to weight ratio gross:
Car weight to power ratio net8.6 kg/kW / 6.3 kg/PS / 14.2 lbs/hp
Car weight to power ratio gross:
Fuel capacity:132 liter / 34.9 U.S. g
Weights
Curb weight (without a driver):2000 kg / 4409 lbs
Performance – Factory claim
Top speed:240 km/h / 149 mph
0-60 mph (s):6.5
0-100 km/h (s):6.8