Cromwell A-27M Infantry Tank

The Cromwell A-27M Infantry Tank played a crucial role in shaping British armored strategies during World War II.

By 1941, the British General Staff recognized the necessity for a tank that was both faster and more powerfully armed than the Matilda II or its successor, the Churchill Infantry Tank, which had a top speed of 15.5 mph and was fitted with a 40mm gun.

Lessons from the Western Desert in North Africa revealed that after neutralizing enemy tanks, friendly forces needed tanks capable of firing high-explosive rounds to assist infantry. This led to the creation of new specifications and the development of a versatile tank designed for both cavalry and infantry support.

Tank Image Gallery

Following multiple unsuccessful attempts, the British General Staff finalized the design of the Cromwell A-27M Infantry Tank. It was equipped with a Rolls Royce Merlin engine, originally used in Spitfire and Hurricane fighter planes, though its power was reduced from 1,075 to 600 horsepower.

This engine provided ample power to propel the Cromwell's 31-ton weight at speeds reaching 40 miles per hour. However, the top speed was later adjusted to 38 miles per hour after it was determined that the tank's chassis couldn't handle the higher speed.

A six-pounder (57mm) gun was chosen as the primary weapon, deemed capable of piercing Nazi German armor in head-on engagements. However, it proved inadequate when firing high-explosive rounds against enemy infantry.

Additionally, the six-pounder gun was outmatched by antitank gunners using the 88mm antitank gun, which had a longer range. This prompted the search for a larger caliber gun to deliver the necessary firepower.

By early 1943, the British had accumulated significant experience with the American M-4 Sherman, which featured a 75mm gun. To address the Cromwell's inadequate firepower, a decision was made to equip it with a gun similar to the Sherman's.

Ammunition was readily available thanks to the American Lend Lease program and captured supplies from Vichy French forces (the French regime that collaborated with Nazi Germany) in Syria.

The 57mm gun was modified to fire 75mm rounds, with the barrel shortened and a muzzle brake installed. Additionally, two BESA 7.92mm machine guns were added—one coaxial with the main gun in the turret and the other in the hull.

The hull-mounted machine gun had limited effectiveness due to its restricted field of fire, leading to its omission in later production models.

For further details on the Cromwell A-27M Infantry Tank's capabilities, proceed to the next page.

For additional details on tanks and military topics, explore the following:

Cromwell A-27M Infantry Tank Performance

Initial versions of the Cromwell A-27M Infantry Tank featured various engine and main gun configurations, but the model equipped with the 75mm gun and powered by the Merlin Meteor engine was officially named the Cromwell IV.

The driver and hull gunner shared a single compartment within the tank's body, while the commander, gunner, and loader were stationed in the turret. The interior space was somewhat tight, particularly when the driver and hull gunner needed to exit quickly. Later models addressed this issue by adding an escape hatch for these crew members.

From its debut in early 1943 until the Normandy Invasion in June 1944, the Cromwell A-27M Infantry Tank served as a training vehicle for new tank crews.

During the Normandy campaign, Cromwells were deployed to France with the 7th Armored Division. However, their initial combat performance fell short of expectations.

The Cromwell's effectiveness was initially hindered by the confined operational area beyond the beachhead, which prevented it from utilizing its key strengths—speed and agility—until the breakout from Caen.

Following the Caen breakout, the Cromwell's Meteor engine proved to be its most valuable feature. It delivered exceptional agility, impressive speed, and remarkable reliability. The Cromwell achieved an advance rate of 70 miles per day after breaking out from the Normandy beachhead.

It became evident even before Normandy that the 75mm gun was inadequate against the thick armor of the Panzerkampfwagen V Panther and the Panzerkampfwagen VI Tiger I, and the Cromwell's own armor couldn't withstand their more potent weapons.

To address this issue, appliqué armor was added to Cromwells, boosting their armor thickness from 2.5 inches to 3.9 inches.

The Cromwell A-27M Infantry Tank's primary strength lay in its exceptional speed and maneuverability, which outclassed both Nazi German tanks and the American M-4 Sherman. While it couldn't match the Panther in direct confrontations, its agility allowed it to outmaneuver and attack Panthers from the rear.

The next upgrade for the Cromwell involved fitting a larger gun. However, the existing chassis was too small for a bigger turret. The solution was to extend the chassis by over five feet and install a new turret housing a 17-pounder (76.2mm high-velocity) gun.

This upgraded tank, named the Challenger (not to be confused with the Challenger Main Battle Tank), was introduced in early 1944 to support the Cromwell and deliver heavy, long-range firepower.

However, even the Challenger, with its enhanced gun, struggled to effectively counter Panthers and Tiger Is.

A new tank, the Comet, was developed based on the Cromwell design. It featured a 77mm 49-caliber gun capable of piercing 4.3 inches of armor at a 30° angle from 500 yards. The Comet entered service in November 1944.

Although the Cromwell was often outshone by the American M-4 Sherman, which excelled in most areas, it played a crucial role in British armored strategies and the rapid advance across northern Europe.

For detailed specifications of the Cromwell A-27M Infantry Tank, refer to our final section.

For additional insights into tanks and military operations, explore the following:

Cromwell A-27M Infantry Tank Specifications

The Cromwell A-27M Infantry Tank was known for its speed and agility. However, despite improvements, it struggled to match the firepower of opposing tanks. Below are the specifications for the British Cromwell A-27M Infantry Tank.

Date of service: 1942

Country: Great Britain

Type: Cruiser Tank, Medium

Dimensions: Length, 6.4 m (21 ft); width, 3.05 m (10 ft); height, 2.48 m (8.16 ft)

Combat weight: 24,948 kg (27.5 tons)

Engine: Rolls Royce Merlin Meteor V-12 gasoline

Armament: One 75mm Mark V primary gun; two 7.92mm BESA machine guns

Crew: 5

Speed: 61 km/h (38 mph)

Range: 278 km (173 mi)

Obstacle/grade performance: 0.9 m (3 ft)

For additional details on tanks and military topics, explore the following: