The main change with the Mk VI, which was introduced in June 1954, was the fitting of an overhead-valve cylinder head to the engine.
The rear of the body was slightly changed, which made the car longer.
In 1955 an estate version with fold-down tailgate appeared.

The April 1956 Mk VIA was a fairly minor upgrade, with changes mainly to the interior.
A de-luxe version was added to the range.

A replacement, slightly more powerful and with an entirely new body was announced in May 1957.

Road test
The motoring correspondent of The Times claimed that any previous Hawk owner would be "astonished" by the Mark VI's 20 per cent more powerful engine's ability to effortlessly swing the car along at 70 mph.
Cold starting was very good.
The engine was not always so willing to start when cold.
The tyres were inclined to squeal on not very sharp corners taken at any more than a modest speed.
The brake lining area is now 40 per cent more than on the Mark V. The driver's windscreen wiper is badly located.

A Mk VI estate car with overdrive tested by the British magazine The Motor in 1956 had a top speed of 79.7 mph (128.3 km/h) and could accelerate from 0-60 mph (97 km/h) in 25.2 seconds.
A fuel consumption of 22.8 miles per imperial gallon (12.4 l/100 km; 19.0 mpg‑US) was recorded.
The test car cost £1405, including taxes.
The main change with the Mk VI, which was introduced in June 1954, was the fitting of an overhead-valve cylinder head to the engine. The rear of the body was slightly changed, which made the car longer. In 1955 an estate version with fold-down tailgate appeared.
The April 1956 Mk VIA was a fairly minor upgrade, with changes mainly to the interior. A de-luxe version was added to the range.
A replacement, slightly more powerful and with an entirely new body was announced in May 1957.
Road test
The motoring correspondent of The Times claimed that any previous Hawk owner would be "astonished" by the Mark VI's 20 per cent more powerful engine's ability to effortlessly swing the car along at 70 mph. Cold starting was very good. The engine was not always so willing to start when cold. The tyres were inclined to squeal on not very sharp corners taken at any more than a modest speed. The brake lining area is now 40 per cent more than on the Mark V. The driver's windscreen wiper is badly located.
A Mk VI estate car with overdrive tested by the British magazine The Motor in 1956 had a top speed of 79.7 mph (128.3 km/h) and could accelerate from 0-60 mph (97 km/h) in 25.2 seconds. A fuel consumption of 22.8 miles per imperial gallon (12.4 l/100 km; 19.0 mpg‑US) was recorded. The test car cost £1405, including taxes.
Humber Hawk