Austin Healey 100

Austin Healey 100: Which Version Should You Buy?

The Austin Healey 100 catalogue contains two versions from a single generation: 2.6 MT and 2.7 MT. Both are Roadsters produced from 1953 through 1956, with Gasoline inline 6-cylinder engines, Carburetor fuel systems, 4-speed Manual gearboxes, and RWD.

The Austin Healey 100 catalogue contains two versions from a single generation: 2.6 MT and 2.7 MT. Both are Roadsters produced from 1953 through 1956, with Gasoline inline 6-cylinder engines, Carburetor fuel systems, 4-speed Manual gearboxes, and RWD. The choice is therefore quite focused: the 2.6 MT provides more power and the only measured top-speed figure, while the 2.7 MT offers more torque, delivers it at lower engine speed, and has a substantially lower listed kerb weight. No price or sale data is provided, so the decision below is based strictly on specifications rather than purchase cost.

Austin Healey 100 generations compared

The Austin Healey 100 has 1 generation in the supplied catalogue, covering 1953–1956. This generation uses a Roadster body and includes 2 versions, named exactly 2.6 MT and 2.7 MT. Because both belong to the same generation and production period, there is no later generation to choose for newer specifications or revised packaging. The meaningful comparison is entirely between the two available versions.

Austin Healey 100 engine specs

The 2.6 MT has 103 hp, which is 13 hp more than the 90 hp 2.7 MT. Its 76 kW output is likewise 10 kW higher than the 66 kW figure of the 2.7 MT. The difference in displacement is small: the 2.7 MT has 2660 cc, only 21 cc more than the 2639 cc 2.6 MT.

Power per litre separates the engines more clearly. Calculated from the supplied displacement and output figures, the 2.6 MT produces approximately 39.0 hp per litre, whereas the 2.7 MT produces approximately 33.8 hp per litre. Buyers prioritizing output from a given engine capacity therefore have a strong numerical reason to prefer the 2.6 MT.

The torque comparison favors the 2.7 MT. It develops 203 Nm at 2000 rpm, giving it 10 Nm more than the 193 Nm produced by the 2.6 MT at 2400 rpm. Its maximum torque also arrives 400 rpm earlier. Conversely, the 2.6 MT reaches maximum power at 4600 rpm, while the 2.7 MT reaches its lower maximum of 90 hp at 4000 rpm.

Both engines are front-mounted longitudinally and use Carburetor fuel systems. Each has 2 valves per cylinder and is specified for fuel grade 76. The 2.6 MT has an 8.5 compression ratio and a 79.4 x 88.9 bore-and-stroke measurement; the 2.7 MT has a 7.5 compression ratio and an 87.3 x 111.1 measurement.

Austin Healey 100 performance and economy

For the 2.6 MT, top speed is measured at 170 km/h. Top speed for the 2.7 MT is not measured, so the available data cannot support a direct maximum-speed comparison. Acceleration from 0–100 km/h is not measured for either version.

Fuel consumption is also not measured for either the 2.6 MT or 2.7 MT in city, highway, or combined driving. Consequently, no evidence-based economy winner can be selected. CO₂ output and environmental class are not measured for either version as well.

Austin Healey 100 dimensions and weight

The principal weight difference is substantial. At 987 kg, the 2.7 MT is 138 kg lighter than the 1125 kg 2.6 MT. Relative to its own listed kerb weight, the 2.6 MT carries more power, but the lower mass of the 2.7 MT largely offsets its lower horsepower when weight per unit of power is calculated.

The 2.6 MT has approximately 10.9 kg per hp, while the 2.7 MT has approximately 11.0 kg per hp. The difference is only about 0.1 kg per hp, so their calculated weight-to-power burdens are very close despite the 13 hp gap. Expressed the other way, both work out to roughly 92 hp per tonne from their listed power and kerb-weight figures.

Each version has a 55 L fuel tank. Gross weight, ground clearance, and wheel sizes are not measured for either version. Body dimensions such as length are also not measured in the supplied data, so no dimensional advantage can be assigned.

Both versions use Independent, spring front suspension and Dependent, leaf spring rear suspension. Drum brakes are fitted at both the front and rear in each case. These specifications do not provide a basis for choosing one version over the other.

Which Austin Healey 100 version should you buy?

Choose the 2.6 MT if outright engine output and documented maximum speed matter most. Its 103 hp exceeds the 2.7 MT by 13 hp, its specific output is approximately 39.0 hp per litre rather than 33.8 hp per litre, and it has a measured top speed of 170 km/h. It also holds a very small calculated advantage in weight per horsepower despite being the heavier car.

Choose the 2.7 MT if lower kerb weight and stronger, earlier torque are more important. It weighs 987 kg—138 kg less than the 2.6 MT—and produces 203 Nm rather than 193 Nm. That peak occurs at 2000 rpm, 400 rpm below the torque peak of the 2.6 MT. Its engine is 21 cc larger, although it produces 13 hp less.

There is no supported answer to what “extra money” buys because prices are not provided. Reliability, common problems, parts condition, and vehicles for sale are likewise outside the available data. Fuel economy cannot settle the choice because every city, highway, and combined-consumption figure is not measured.

On specifications alone, the 2.6 MT is the stronger choice for power, power per litre, and a documented top-speed figure. The 2.7 MT is the more compelling alternative for buyers who prioritize a 138 kg lower kerb weight and 10 Nm more torque delivered 400 rpm earlier. Since both versions share the same generation, Roadster body, 4-speed Manual transmission, RWD layout, suspension configuration, brake type, and 55 L tank, those power, torque, and weight differences should drive the final decision.