Altay vs Merkava Mk.4: Same Tonnage, Same Calibre, Two Schools of Tank Design

Same tonnage, same calibre, two schools

The main battle tank is the least forgiving product in the defence business. How heavy a tank can be is decided by a country’s bridges and transporters, not by its designer. How fast it moves is decided by how many tonnes each horsepower has to shift. How deep it penetrates depends less on the gun than on the generation of ammunition fed into it. Which is why every 65-tonne, 120 mm, 1,500 hp tank in the world ends up resembling every other one.

The Altay and the Merkava Mk.4 are no exception. Four crew each, loader included. A 120 mm smoothbore each. Fifteen hundred horsepower each. Range between 450 and 500 kilometres. Road speed a shade above 60 km/h. The honest answer to “which is better” is that these rows do not answer it.

The answer is inside the hull. The most expensive decision in tank design is where to put the engine, because that single choice sets weight distribution, silhouette height, maintenance access, crew egress and what the vehicle loses when it is hit from a given aspect. The Merkava answered that question forty years ago and has never revisited it. The Altay inherited the answer shared by the Western and East Asian schools.

What the systems actually say

Altay — BMC, Aselsan and SSB

BMC publishes an unusually complete data set. Crew of four: commander, gunner, loader, driver. A 120 mm L55 smoothbore firing STANAG 4385-compatible ammunition, with stowage for 40 rounds. A 7.62 mm coaxial machine gun, plus a remote weapon station that can carry 12.7 mm and 7.62 mm machine guns or a 40 mm grenade launcher.

Mobility: a 12-cylinder, 1,500 hp electronically controlled engine; six forward and three reverse gears; 65 km/h on road and 45 km/h cross-country; 450 km of range; 60 per cent gradient, one-metre vertical step, three-metre trench. Fording runs from 1.2 m unprepared to 4 m in deep-wading configuration. The declared operating envelope is +52 °C to −32 °C — a specification that says a good deal about where the Turkish Land Forces expect to fight.

Protection is described as hybrid: composite and reactive elements in the same armour system, bar armour solutions, a spall liner, a laser detection and warning system, nuclear and chemical detection, fire suppression and CBRN life support. On top of that sits Aselsan’s AKKOR active protection system. Aselsan states AKKOR carries both hard-kill and soft-kill functions, with AKKOR KAMA detecting an incoming missile or rocket by radar, classifying it with an electro-optic sensor and defeating it at a safe standoff distance. Aselsan also says the system is already fitted to the first two serial Altay tanks.

The programme itself is young. SSB’s 2025 activity report records the first two tanks delivered to the Turkish Armed Forces against a planned run of 250. Initial deliveries use a Korean powerpack; the domestic 1,500 hp BATU unit takes over once qualification is complete — after the 85th tank, according to Defense News, which also reports the new BMC plant is laid out for eight tanks a month.

Merkava Mk.4 — four decades of one idea

Israel’s Ministry of Defense tells the origin story on its own directorate page: an administration set up in 1970 to break dependence on foreign suppliers, the first Merkava Mark I delivered roughly nine years later, and Maj. Gen. Israel Tal remembered as the programme’s architect. The ministry describes the Mark IV as fitted with the Trophy active protection system and as “one of the world’s most armored tanks.”

The numbers come from the international defence press. Army Technology gives 9.04 m with the gun forward, 3.72 m wide without skirts, 2.66 m to the turret roof and 65 tonnes. A V-12 diesel of 1,500 hp drives a five-speed automatic; top speed is above 60 km/h, with up to 55 km/h cross-country and 500 km of range.

Two armament details separate it from the Altay. It stows 48 rounds, ten of them ready. And it carries an internally operated 60 mm mortar with a range of 2,700 m — a way of producing close support fire without spending main-gun ammunition, which matters a great deal in built-up terrain. Gun-launched LAHAT guided rounds are also part of the inventory.

The current configuration, Barak, was unveiled in September 2023 and first went to the 52nd Battalion of the 401st Armoured Brigade. Its additions are electronic rather than structural: Elbit Systems’ Iron Vision helmet, which lets the commander see around the vehicle with the hatches closed; the Torch C4i battle management system; and AI-assisted image processing that classifies what the sensors find. Trophy was already in the package.

Where the engine sits decides everything else

The Merkava’s powerpack is at the front. The logic is straightforward: a tank is most often hit frontally because that is the aspect it fights with. Put the engine there and you insert a mass of metal, alloy and fluid between the incoming round and the crew — you turn a component never designed as armour into part of the armour.

The second consequence is the space that opens at the rear. Army Technology puts it at eight infantry or three stretcher cases. A tank that can double as a casualty evacuation vehicle is a meaningful flexibility for an army fighting in confined, mined terrain — and the Namer heavy APC, derived from the same hull, is the direct product of that architecture.

It costs something. The layout raises the silhouette, changes the centre of gravity, and means a frontal hit that protects the crew can also end mobility completely. This is not a claim of superiority; it is a specific answer to a specific threat picture — short-range, dense anti-tank fire, close to built-up areas, where the political cost of crew losses is extremely high.

The Altay keeps the conventional layout and buys its protection differently: layered armour plus an active protection system. Its own threat picture is written into the spec sheet — the +52/−32 °C envelope, the four-metre fording capability, the 450 km range. These are the requirements of a force expecting to operate across wide, varied terrain rather than within a compact theatre.

Technical comparison

Altay figures are from BMC’s official technical specifications page, with programme data from SSB and Defense News; Merkava figures are from the Israel Ministry of Defense, the IDF and Army Technology. Rows without a published official figure are marked rather than estimated.

Operators and operational record

Here the comparison stops being symmetric. The Merkava family has been in continuous operational use since 1982, and the decision to field Trophy at scale came directly out of the anti-tank missile threat encountered from the 2006 Lebanon campaign onward. Since 2023, in operations in Gaza and southern Lebanon, open sources have recorded the loss of a substantial number of vehicles, including Barak-configuration tanks; a Barak destroyed by a large improvised explosive device in November 2024 became the most widely discussed of those cases.

That record also marks the limits of the survivability narrative built around active protection and layered armour. APS is designed against threats arriving within a given angle and velocity band; it offers far less against a large charge detonating beneath the hull or a munition diving from above. This is not a Merkava-specific weakness — it is the shared problem of every modern tank.

The Altay has no operational record to weigh. What it has is a documented test burden: 1.5 million engineering hours, 35,000 kilometres of mobility testing and 3,700 live-fire trials, according to Defense News. That is not a substitute for combat hours, but it is not nothing either. One design has been proven; the other is at the beginning of proving itself, and any comparison that blurs that distinction is incomplete.

What is not published

Armour thickness and protection levels are unpublished for both tanks — a universal limit in this genre. The Merkava’s operating temperature envelope and fording capability do not appear in official sources; the Altay’s weight is absent from BMC’s own specification page. Neither Aselsan nor Rafael publishes reaction time, sector coverage or simultaneous engagement capacity for AKKOR and Trophy. And on the Altay side a second unknown remains: whether the performance rows hold once the BATU powerpack replaces the Korean unit.

Assessment