The comparison of the Indian Tejas Mark 2 and the South Korean KF 21

The HAL Tejas Mk2 and the KAI KF-21 Boramae represent two ambitious next-generation fighter programs from India and South Korea.

Both aircraft are designed to strengthen their nations’ air power with advanced avionics, improved range, and modern combat capabilities. While the Tejas Mk2 focuses on replacing older fleets with a versatile, cost-effective platform, the KF-21 aims to bridge the gap between 4.5 and 5th-generation fighters. Each jet reflects a unique design philosophy shaped by strategic needs and technological priorities. This comparison explores how these two emerging fighters stack up against each other.

Let’s start with the basics. The KF-21 is a heavier, twin-engine fighter, while the Tejas Mk2 is a lighter, single-engine jet. This immediately shapes their roles—KF-21 focuses on power, payload, and survivability, while Tejas Mk2 leans toward agility, efficiency, and lower operating cost.

In terms of size and weight, the KF-21 is clearly bigger, with a maximum takeoff weight of around 24,400 kg compared to Tejas Mk2’s 17,500 kg. That extra weight allows the Korean jet to carry more fuel and weapons, but it also means higher operational costs. The Tejas Mk2, being lighter, is easier to maintain and deploy.

When it comes to engines, the KF-21 uses two GE F414 engines, giving it better redundancy and thrust advantage. On the other hand, the Tejas Mk2 uses a single GE F414 engine with around 98 kN thrust, which keeps it simpler and more cost-effective while still delivering strong performance.

In terms of speed, the KF-21 can reach approximately Mach 1.8. Similarly, the Tejas Mk2 also has a top speed of around Mach 1.8, making both jets nearly equal in this aspect.

The KAI KF-21 Boramae has an estimated payload capacity of around 5,500–6,000 kg. In comparison, the HAL Tejas Mk2 can carry up to 6,500 kg, giving it a slight advantage.

The KF-21 is expected to cost approximately $65–70 million per unit. On the other hand, the Tejas Mk2 is projected to be more affordable, with an estimated cost of around $40–50 million per aircraft.

The KF-21 comes with 10 hardpoints for carrying weapons and external stores. In comparison, the Tejas Mk2 offers 13 hardpoints, providing greater flexibility in weapon configurations.

For range, the KF-21 has a ferry range of about 2,900 km. Meanwhile, the Tejas Mk2 offers a longer range of roughly 3,500 km, giving it better endurance for long missions.

The KAI KF-21 Boramae, formerly known as the KF-X, is a South Korean fighter jet that collaborates with Indonesia with the aim of building an advanced multirole fighter for the air forces of both countries. the KAI offices near Sacheon Airport had a rollout ceremony where the first prototype was finished and unveiled. The first test flight took place on July 19, 2022, and production was set to start in 2026.

The Tejas Mark 2, also known as the Medium Weight Fighter, it is a single-engine, canard delta wing, multirole combat aircraft developed by Hindustan Aeronautics Limited’s Aircraft Research and Design Center for the Indian Air Force. it is anticipated to fly for the first time in 2023, and production was set to start by 2026.

On avionics, both jets are highly advanced. The Tejas Mk2 features India’s indigenous Uttam AESA radar, IRST, and a powerful electronic warfare suite. The KF-21 also comes with an AESA radar, advanced sensors, and strong data-link capabilities. However, the KF-21 is currently more mature, with extensive flight testing already underway.

In terms of development status, this is where the biggest difference lies. The KF-21 has already flown and is entering production, with multiple aircraft ordered by South Korea. The Tejas Mk2 is still in the prototype stage, with its first flight expected soon and production planned later.

Recent Upgrades:
The KAI KF-21 Boramae has already introduced Block I focused on air-to-air combat, while Block II will expand into full strike capabilities by around 2027. It also features an indigenous AESA radar under advanced testing and future plans for more stealth features and drone integration.
The HAL Tejas Mk2 comes with a larger airframe, close-coupled canards for better maneuverability, a modern touch-screen cockpit, improved electronic warfare systems, and a powerful GE F414 engine with technology transfer for local production.

Orders:
The KF-21 has secured confirmed orders from South Korea, with 40 Block I aircraft planned by 2028 and 80 Block II by 2032, along with export interest from countries like Indonesia and others.
In contrast, the Tejas Mk2 has no confirmed production order yet, but the Indian Air Force is expected to require 100 to 250+ aircraft in the future.

Production Status:
The KF-21 is already in low-rate production, with its first deliveries to the South Korean Air Force starting from 2026 and production scaling up steadily.
Meanwhile, the Tejas Mk2 is still in the prototype stage, with rollout expected in 2026, first flight planned soon after, and full-scale production targeted around 2029 or later.

In conclusion, the KAI KF-21 Boramae is clearly ahead in terms of development, testing, and production readiness, making it a more “ready-to-deploy” fighter today. The HAL Tejas Mk2, however, is built with a long-term vision, focusing on cost efficiency, flexibility, and strong indigenous capability.

While KF-21 offers twin-engine power, higher maturity, and growing export potential, Tejas Mk2 brings better range, agility, and lower operating costs. Ultimately, KF-21 leads in the present, but Tejas Mk2 holds strong promise for the future once it enters service.