Aston Martin hand-assembles a special version of the AJ-V8 for the 2005 V8 Vantage known as AJ37.
 This unit displaced 4.3 L; 261.2 cu in (4,280 cc) and produces 380 bhp (283 kW; 385 PS) at 7,000 rpm and 409 N⋅m (302 lb⋅ft) at 5,000 rpm.
This engine is unique to Aston Martin and features race-style dry-sump lubrication, which enables it to be mounted low to lower the centre of gravity.
The firing order is the same as the other AJ-V8 engines although the cylinder numbering is different (AJ37 = 1-5-4-2-6-3-7-8 vs. AJ26 = 1-2-7-3-4-5-6-8).
 The engine is assembled by hand at the AM facility in Cologne, Germany, which also builds the V12 for the DB9 and Vanquish.
The cylinder block, cylinder heads, crankshaft, connecting rods, pistons, camshafts, inlet and exhaust manifolds, lubrication system and engine management are all unique to the Aston Martin version.

In May 2008, Aston Martin released a new design that used pressed cylinder liners instead of cast-in liners.
This allowed for thinner liners, and a higher capacity of 4.7 L; 288.9 cu in (4,735 cc) for the V8 Vantage.
Power output increased to 420 bhp (313 kW; 426 PS) (an 11% increase on the previous 4.3-litre unit) and peak torque to 470 N⋅m (347 lb⋅ft) (a 15% increase).
The Aston Martin V8 Vantage S features the same 4.7-litre V8 engine found in the base Vantage, but with improved intake airflow, new mufflers, and new programming that keeps the exhaust system’s bypass valves open longer.
The engine in the V8 Vantage S now develops 430 bhp (321 kW; 436 PS) at 7,300 rpm and torque of 490 N⋅m (361 lb⋅ft) at 5,000 rpm representing an increase of 10 bhp (7 kW; 10 PS) and 20 N⋅m (15 lb⋅ft) respectively.
This engine is also used in the bespoke Aston Martin DB10 concept car for the 2015 James Bond film Spectre.

4.3 bore and stroke 89 mm × 86 mm (3.50 in × 3.39 in)
4.7 bore and stroke 91 mm × 91 mm (3.58 in × 3.58 in)
Applications:
2005-2017 Aston Martin V8 Vantage
2014-2015 Aston Martin DB10 (Concept car)
Aston Martin hand-assembles a special version of the AJ-V8 for the 2005 V8 Vantage known as AJ37.  This unit displaced 4.3 L; 261.2 cu in (4,280 cc) and produces 380 bhp (283 kW; 385 PS) at 7,000 rpm and 409 N⋅m (302 lb⋅ft) at 5,000 rpm. This engine is unique to Aston Martin and features race-style dry-sump lubrication, which enables it to be mounted low to lower the centre of gravity. The firing order is the same as the other AJ-V8 engines although the cylinder numbering is different (AJ37 = 1-5-4-2-6-3-7-8 vs. AJ26 = 1-2-7-3-4-5-6-8).  The engine is assembled by hand at the AM facility in Cologne, Germany, which also builds the V12 for the DB9 and Vanquish. The cylinder block, cylinder heads, crankshaft, connecting rods, pistons, camshafts, inlet and exhaust manifolds, lubrication system and engine management are all unique to the Aston Martin version.
In May 2008, Aston Martin released a new design that used pressed cylinder liners instead of cast-in liners. This allowed for thinner liners, and a higher capacity of 4.7 L; 288.9 cu in (4,735 cc) for the V8 Vantage. Power output increased to 420 bhp (313 kW; 426 PS) (an 11% increase on the previous 4.3-litre unit) and peak torque to 470 N⋅m (347 lb⋅ft) (a 15% increase). The Aston Martin V8 Vantage S features the same 4.7-litre V8 engine found in the base Vantage, but with improved intake airflow, new mufflers, and new programming that keeps the exhaust system’s bypass valves open longer. The engine in the V8 Vantage S now develops 430 bhp (321 kW; 436 PS) at 7,300 rpm and torque of 490 N⋅m (361 lb⋅ft) at 5,000 rpm representing an increase of 10 bhp (7 kW; 10 PS) and 20 N⋅m (15 lb⋅ft) respectively. This engine is also used in the bespoke Aston Martin DB10 concept car for the 2015 James Bond film Spectre.
4.3 bore and stroke 89 mm × 86 mm (3.50 in × 3.39 in)
4.7 bore and stroke 91 mm × 91 mm (3.58 in × 3.58 in)
Applications:
2005-2017 Aston Martin V8 Vantage
2014-2015 Aston Martin DB10 (Concept car)
Jaguar AJ-V8 engine