Lamborghini 350/400 GT: Which Version Should You Choose?
The Lamborghini 350/400 GT catalogue contains two versions: 3.5 MT and 3.9 MT. Both belong to the same generation, use a naturally aspirated Gasoline V-shaped 12-cylinder engine in a Front, longitudinal layout, and combine a 5-speed Manual gearbox with RWD. The choice therefore comes down mainly to engine output and the availability of performance data.
The Lamborghini 350/400 GT catalogue contains two versions: 3.5 MT and 3.9 MT. Both belong to the same generation, use a naturally aspirated Gasoline V-shaped 12-cylinder engine in a Front, longitudinal layout, and combine a 5-speed Manual gearbox with RWD. The choice therefore comes down mainly to engine output and the availability of performance data. The 3.5 MT produces 270 hp from 3,464 cc and has measured acceleration and top-speed figures; the 3.9 MT raises output to 320 hp from 3,929 cc but has no measured performance figures in the supplied data.
Lamborghini 350/400 GT versions and generation comparison
There is only one Lamborghini 350/400 GT generation in the catalogue, produced from 1964 to 1968 as a Coupe. It includes two versions, 3.5 MT and 3.9 MT. Because both versions sit within the same generation, there is no generation-to-generation change to compare and no separate restyling listed in the data.
The meaningful comparison is between the two engines. Moving from 3.5 MT to 3.9 MT adds 465 cc of displacement and 50 hp. That represents an engine-capacity increase of about 13.4% and a power increase of about 18.5%. The larger engine therefore delivers a greater proportional increase in power than in displacement.
Engine specs: 3.5 MT vs 3.9 MT
| Version | Power | Torque | Displacement | Fuel | Cylinders | Layout | Boost | Gearbox | Drive |
|---|---|---|---|---|---|---|---|---|---|
| 3.5 MT | 270 hp / 199 kW at 6500 rpm | not measured | 3,464 cc | Gasoline | 12 | V-shaped; Front, longitudinal | No | 5-speed Manual | RWD |
| 3.9 MT | 320 hp / 235 kW at 6500 rpm | not measured | 3,929 cc | Gasoline | 12 | V-shaped; Front, longitudinal | No | 5-speed Manual | RWD |
The 3.5 MT produces approximately 77.9 hp per litre, while the 3.9 MT produces approximately 81.4 hp per litre. The difference is about 3.5 hp per litre in favour of the 3.9 MT. In metric output, the 3.9 MT adds 36 kW over the 3.5 MT.
Both versions reach their stated maximum power at 6500 rpm. Neither engine uses boost, and both have the same V-shaped cylinder arrangement, 12-cylinder count, Front, longitudinal mounting, 5-speed Manual transmission, and RWD configuration. A Carburetor fuel system is listed for the 3.9 MT; the corresponding system for the 3.5 MT is not measured.
Torque is not measured for either version. Compression ratio, bore and stroke, and the number of valves per cylinder are also not measured for both engines.
Performance, top speed, and fuel economy
| Version | 0–100 km/h | Top speed | City consumption | Highway consumption | Combined consumption |
|---|---|---|---|---|---|
| 3.5 MT | 6.8 seconds | 254 km/h | not measured | not measured | not measured |
| 3.9 MT | not measured | not measured | not measured | not measured | not measured |
The 3.5 MT is the version to choose when verified catalogue performance figures matter. Its measured 0–100 km/h time is 6.8 seconds, and its measured top speed is 254 km/h.
The 3.9 MT has 50 hp more than the 3.5 MT, but its 0–100 km/h time and top speed are not measured in the supplied data. The higher output alone does not justify inventing an acceleration or speed advantage, so no numerical performance comparison can be made beyond the documented power difference.
Fuel consumption is not measured for either version in city, highway, or combined driving. Fuel-tank capacity and CO₂ output are also not measured. Consequently, the available data cannot identify a more economical version or establish how far either one can travel on a tank.
Dimensions, weight, and chassis specifications
| Version | Kerb weight | Gross weight | Ground clearance | Fuel tank | Wheel sizes |
|---|---|---|---|---|---|
| 3.5 MT | not measured | not measured | not measured | not measured | not measured |
| 3.9 MT | not measured | not measured | not measured | not measured | not measured |
Kerb weight and gross weight are not measured for either 3.5 MT or 3.9 MT. This means weight per horsepower cannot be calculated from the supplied data. Ground clearance, fuel-tank capacity, and wheel sizes are likewise not measured for either version.
Both versions use Independent, spring front suspension and Independent, spring rear suspension. Disc front brakes are listed for both versions, while the rear-brake specification is not measured.
Which Lamborghini 350/400 GT version should you buy?
Choose the 3.5 MT if your decision depends on the most complete set of measured performance figures. It provides 270 hp and 199 kW from 3,464 cc, with a documented 6.8-second 0–100 km/h time and a documented 254 km/h top speed. Its specific output is approximately 77.9 hp per litre.
Choose the 3.9 MT if maximum stated engine output is the priority. It provides 320 hp and 235 kW from 3,929 cc, giving 50 hp and 36 kW more than the 3.5 MT. Its approximately 81.4 hp-per-litre specific output is also about 3.5 hp per litre higher. What the upgrade buys in the supplied figures is therefore clear: 465 cc of additional displacement and 50 hp of additional power.
The data does not establish which version is faster in measured testing, more fuel-efficient, lighter, or better in power-to-weight terms. It also contains no prices, so the extra cost of choosing the 3.9 MT and its value for money cannot be calculated. On the available evidence, 3.5 MT is the evidence-led performance choice, while 3.9 MT is the higher-output choice.