Alvand vs Type 21
Overview
The Alvand and the Type 21 are both Frigate classes.
The Type 21 displaces 3,250 tons — 2.1x the Alvand's 1,540 tons. The Alvand reaches 39 knots vs 37 knots for the Type 21. Operational range is 5,000 nautical miles for the Alvand vs 4,000 for the Type 21. The Alvand carries a crew of 146 vs 177 for the Type 21.
The Alvand was produced in 4 units vs 8 for the Type 21. The Alvand was commissioned in 1971, 3 years before the Type 21 (1974).
| Iranian frigate, introduced in 1971, reaches a speed of 39 knots. | |
| Origin | 🇬🇧 United Kingdom |
| Category | Frigate |
| Type | Frigate |
| Manufacturer | Vosper Thornycroft |
| Year introduced | 1971 |
| Number built | 4 units |
| Estimated unit price | NA |
| British frigate, 3,250 tons displacement, propelled by COGOG arrangement for a top speed of 37 knots. | |
| Origin | 🇬🇧 United Kingdom |
| Category | Frigate |
| Type | Frigate |
| Manufacturer | Yarrow Shipbuilders |
| Year introduced | 1974 |
| Number built | 8 units |
| Estimated unit price | $60 million |
| Displacement | 1,540 tons ◉ |
| Maximum speed | 39.0 knots ◉ |
| Range | 5,000 nm at 15 knots ◉ |
| Length | 94.5 m ◉ |
| Beam | 11.1 m ◉ |
| Crew | 146 ◉ |
| Propulsion | 2 Paxman Ventura cruising diesels 3,800 bhp (2,800 kW), and 2 Rolls-Royce Olympus TM2 boost gas turbines 46,000 shp (34,000 kW) on 2 shafts |
| Armament |
|
| Displacement | 3,250 tons ◉ |
| Maximum speed | 37.0 knots ◉ |
| Range | 4,000 nm at 1200 knots ◉ |
| Length | 117.0 m ◉ |
| Beam | 12.7 m ◉ |
| Crew | 177 ◉ |
| Propulsion | COGOG on 2 shafts; 2 × Tyne cruise turbines: 8,500 shp (6,300 kW); 2 × Olympus boost turbines: 50,000 shp (37,000 kW) |
| Armament |
|
Performance Radar Chart
Detailed Comparison
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Frequently Asked Questions
Which has greater displacement, the Alvand-class or Type 21-class?
The Type 21-class has greater displacement at 3,250 tons compared to the Alvand-class's 1,540 tons.
Which is faster, the Alvand-class or Type 21-class?
The Alvand-class is faster with a maximum speed of 39 knots compared to the Type 21-class's 37 knots.
Which has longer range, the Alvand-class or Type 21-class?
The Alvand-class has a longer range at 5,000 nautical miles compared to the Type 21-class's 4,000 nautical miles.
Which is longer, the Alvand-class or Type 21-class?
The Type 21-class is longer at 117.0 meters compared to the Alvand-class's 94.5 meters.
How many crew members do the Alvand-class and Type 21-class have?
The Type 21-class has a larger crew complement of 177 compared to the Alvand-class's 146 crew members.
Which has been built in greater numbers, the Alvand-class or Type 21-class?
The Type 21-class has been built in greater numbers with 8 vessels compared to 4 vessels of the Alvand-class.