Which Aston Martin DBX Version Should You Buy?
The Aston Martin DBX choice comes down to four distinct specifications despite the catalogue repeatedly using the exact version name 4.0 AT. The original generation offers 3.0 AT with 435 hp, 4.0 AT with 550 hp, and 4.0 AT with 707 hp. The restyled generation offers 4.0 AT with 707 hp and 4.0 AT with 727 hp. For the lowest output and the least aggressive performance, choose the 3.0 AT.
The Aston Martin DBX choice comes down to four distinct specifications despite the catalogue repeatedly using the exact version name 4.0 AT. The original generation offers 3.0 AT with 435 hp, 4.0 AT with 550 hp, and 4.0 AT with 707 hp. The restyled generation offers 4.0 AT with 707 hp and 4.0 AT with 727 hp. For the lowest output and the least aggressive performance, choose the 3.0 AT. The 550 hp 4.0 AT is the middle ground. The 707 hp and 727 hp versions deliver the strongest acceleration, the highest top speed, and ceramic ventilated brakes. Price, used-car availability, interior equipment, reliability, and problem data are not measured, so they cannot decide the comparison here.
Aston Martin DBX generations and versions
The original 1 generation has been in production since November 2019 as an SUV 5-doors and contains three versions. Its 4.0 AT with 550 hp started in November 2019, the 3.0 AT with 435 hp followed in November 2021, and the 4.0 AT with 707 hp started in January 2022.
The 1 generation, restyling 1 has been in production since April 2024 and remains part of the same first generation rather than constituting another generation. This restyled SUV 5-doors has two versions: a 4.0 AT with 707 hp and a 4.0 AT with 727 hp. Both began in April 2024. Across the model data, the DBX therefore has 2 listed generation entries, comprising the original generation and its restyling.
The key numerical change after restyling is at the top of the range. The 727 hp 4.0 AT adds 20 hp over the 707 hp 4.0 AT, while torque remains 900 Nm, acceleration to 100 km/h remains 3.3 seconds, and maximum speed remains 310 km/h. The restyled 727 hp version is also 47 kg lighter than the 707 hp versions with a measured kerb weight.
Aston Martin DBX engine specs
| Generation | Exact version | Power | Torque | Displacement | Fuel | Cylinders and layout | Boost | Gearbox | Drive |
|---|---|---|---|---|---|---|---|---|---|
| 1 generation | 3.0 AT — 435 hp | 435 hp / 319 kW at 6500 rpm | 520 Nm at 2200–5000 rpm | 2999 cc | Gasoline | 6, Inline | Turbo | 9-speed Automatic | AWD |
| 1 generation | 4.0 AT — 550 hp | 550 hp / 405 kW at 6500 rpm | 700 Nm at 2200–5000 rpm | 3982 cc | Gasoline | 8, V-shaped | Turbo | 9-speed Automatic | AWD |
| 1 generation | 4.0 AT — 707 hp | 707 hp / 519 kW at 6500 rpm | 900 Nm at 2200–5000 rpm | 3982 cc | Gasoline | 8, V-shaped | Turbo | 9-speed Automatic | AWD |
| 1 generation, restyling 1 | 4.0 AT — 707 hp | 707 hp / 519 kW at 6500 rpm | 900 Nm at 2200–5000 rpm | 3982 cc | Gasoline | 8, V-shaped | Turbo | 9-speed Automatic | AWD |
| 1 generation, restyling 1 | 4.0 AT — 727 hp | 727 hp / 534 kW at 6250 rpm | 900 Nm at 2200–5000 rpm | 3982 cc | Gasoline | 8, V-shaped | Turbo | 9-speed Automatic | AWD |
Every engine is front-mounted longitudinally, uses Direct injection (direct), has 4 valves per cylinder, requires 98 fuel, and meets Euro 6. The 3.0 AT has a compression ratio of 10.5 and an 83 × 92.4 mm bore and stroke. Every 4.0 AT has a compression ratio of 8.6 and an 83 × 92 mm bore and stroke.
Calculated from displacement and output, the 3.0 AT produces about 145 hp per litre, while the 550 hp 4.0 AT produces about 138 hp per litre. Both 707 hp specifications produce about 178 hp per litre, and the restyled 727 hp version reaches about 183 hp per litre. The 3.0 AT therefore has slightly greater specific output than the 550 hp 4.0 AT, but the latter supplies 115 hp and 180 Nm more in absolute terms.
Moving from the 550 hp 4.0 AT to either 707 hp 4.0 AT adds 157 hp and 200 Nm without changing the 3982 cc displacement. Moving from the 3.0 AT to a 707 hp 4.0 AT adds 272 hp and 380 Nm.
Aston Martin DBX performance and economy
| Generation | Exact version | 0–100 km/h | Top speed | Fuel consumption | CO₂ |
|---|---|---|---|---|---|
| 1 generation | 3.0 AT — 435 hp | 5.4 sec | 259 km/h | City: not measured; highway: not measured; combined: not measured | not measured |
| 1 generation | 4.0 AT — 550 hp | 4.5 sec | 291 km/h | City: not measured; highway: not measured; combined: not measured | 269 |
| 1 generation | 4.0 AT — 707 hp | 3.3 sec | 310 km/h | City: not measured; highway: not measured; combined: not measured | not measured |
| 1 generation, restyling 1 | 4.0 AT — 707 hp | 3.3 sec | 310 km/h | City: not measured; highway: not measured; combined: not measured | not measured |
| 1 generation, restyling 1 | 4.0 AT — 727 hp | 3.3 sec | 310 km/h | City: not measured; highway: not measured; combined: not measured | not measured |
The 550 hp 4.0 AT reaches 100 km/h 0.9 second sooner than the 3.0 AT and raises maximum speed by 32 km/h. A 707 hp 4.0 AT cuts another 1.2 seconds from the acceleration time and adds 19 km/h over the 550 hp version. Overall, the 707 hp specification is 2.1 seconds quicker to 100 km/h and 51 km/h faster at maximum speed than the 3.0 AT.
The restyled 727 hp 4.0 AT does not improve the measured performance figures over the restyled 707 hp 4.0 AT: both record 3.3 seconds to 100 km/h and 310 km/h. A 0–60 mph result is not measured for any version. Fuel consumption is also not measured for any version, so an mpg comparison cannot be made from these specifications.
Aston Martin DBX weight, ground clearance and size-related specs
| Generation | Exact version | Kerb weight | Gross weight | Ground clearance | Tank | Wheel sizes |
|---|---|---|---|---|---|---|
| 1 generation | 3.0 AT — 435 hp | not measured | not measured | 190 mm | not measured | 285/40 R22; 325/35 R22 |
| 1 generation | 4.0 AT — 550 hp | 2245 kg | not measured | 190 mm | 85 L | 285/40 R22; 325/35 R22 |
| 1 generation | 4.0 AT — 707 hp | 2245 kg | not measured | 190 mm | 85 L | 285/40 R22; 325/35 R22 |
| 1 generation, restyling 1 | 4.0 AT — 707 hp | 2245 kg | not measured | 190 mm | 85 L | not measured |
| 1 generation, restyling 1 | 4.0 AT — 727 hp | 2198 kg | 2960 kg | 190 mm | 85 L | not measured |
Exterior length, width, height, and wheelbase are not measured, so a full DBX dimensions or size comparison is not possible from the available data. Ground clearance does not separate the versions because every one is listed at 190 mm.
Among versions with measured weights, the 550 hp 4.0 AT carries about 4.08 kg per hp, the original and restyled 707 hp 4.0 AT versions carry about 3.18 kg per hp, and the restyled 727 hp 4.0 AT carries about 3.02 kg per hp. The restyled 727 hp version consequently has the best calculated weight-to-power relationship.
Every version uses independent pneumatic suspension at the front and rear. The 3.0 AT and 550 hp 4.0 AT use Ventilated disc brakes at both ends. Both 707 hp versions and the 727 hp version use Ceramic ventilated brakes at the front and rear.
Which Aston Martin DBX version to buy and why
Choose the 3.0 AT with 435 hp if the lowest-output DBX is sufficient. Its 5.4-second acceleration and 259 km/h maximum speed trail every 4.0 AT, but its calculated 145 hp per litre exceeds the 550 hp version’s approximately 138 hp per litre. Its kerb weight, gross weight, tank capacity, CO₂ figure, and consumption are not measured, preventing a complete running-cost comparison.
Choose the 4.0 AT with 550 hp for the numerical middle ground. Compared with the 3.0 AT, it gains 115 hp and 180 Nm, reduces the 0–100 km/h time by 0.9 second, and adds 32 km/h to maximum speed. It retains Ventilated disc brakes rather than the Ceramic ventilated brakes fitted to the more powerful variants.
Choose a 4.0 AT with 707 hp when the major priority is performance. Its 900 Nm, 3.3-second acceleration, and 310 km/h maximum speed are substantial gains over the 550 hp version. The original and restyled 707 hp versions have identical listed engine output, torque, acceleration, maximum speed, kerb weight, ground clearance, tank capacity, suspension, and brake specifications. The available numbers therefore do not establish a performance advantage for either 707 hp version.
Choose the restyled 4.0 AT with 727 hp for the highest power and strongest calculated weight-to-power figure. It supplies 20 hp more and weighs 47 kg less than the measured 707 hp versions, improving from about 3.18 kg per hp to about 3.02 kg per hp. However, it retains the same 900 Nm, 3.3-second 0–100 km/h time, and 310 km/h maximum speed. On the measured figures, its advantage is power and weight rather than quicker acceleration or a higher top speed.
No version can be recommended on price, value for money, availability for sale, interior specification, reliability, or reported problems because those figures are not measured. Based strictly on the supplied specifications, the 550 hp 4.0 AT is the balanced choice, either 707 hp 4.0 AT is the performance choice, and the restyled 727 hp 4.0 AT is the choice for maximum output and the best measured weight-to-power relationship.