Oscar-class submarine vs Riachuelo-class submarine

FORCETALLY

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ASubmarines

Oscar-class submarine

Nuclear-powered cruise missile submarine

Credit

Sergey Konovalov · CC BY 4.0 · Resized · CC BY 4.0 · Source ↗ · Modified

Riachuelo-class submarine — licensed reference photograph

BSubmarines

Riachuelo-class submarine

Attack submarine

Credit

Marinha do Brasil · CC BY-SA 2.0 · Resized · CC BY-SA 2.0 · Source ↗ · Modified

First system

Second system

At a glance

Side by side

Length comparisonOne shared metre scale

Oscar-class submarinemaximum

155 m

Length source ↗

Riachuelo-class submarineNuclear

100 m

Length source ↗

Lengths retain their source configuration and measurement scope.

Measured figures

Head to head

18 of 33 rows sourced on both sides

155mmaximum

100mNuclear

LengthScopes differ

All recorded figures & sources

155 m

maximum

Single source

155 m (508 ft 6 in) maximum^[source]

70.62 m

Diesel-electric

Single source

Configuration

Details

Oscar-class submarine and Riachuelo-class submarine configuration
Specification	Oscar-class submarine	Riachuelo-class submarine
Complement	94/107^[source]	Diesel-electric: 32 Nuclear: 100^[source]
Power	2 × pressurized water cooled reactors, HEU ≤ 45%^[source] 2 × steam turbines delivering 73,070 kW (97,990 shp) to two shafts^[source]	Diesel-electric: 4 × MTU 12V 396 SE84 diesels 1,500 hp (1,119 kW) each 1 × Jeumont-Schneider EPM Magtronic electric 3,909 hp (2,915 kW) 1 × Shaft Exide Hagen batteries Nuclear: 1 × Pressurized water reactor, 48 MW (64,000 hp), LEU 20% 1 × Nuclear turbo-electric engine 1 × Shaft^[source]
Name	Oscar II class^[source]	Riachuelo class^[source]

Builders	Sevmash^[source]	ICN^[source]

Operators	Soviet Navy Russian Navy^[source]	Brazilian Navy^[source]

Preceded by	Papa class Charlie class^[source]	Tupi class^[source]

Succeeded by	Yasen class^[source]	—

Built	1975–2022, may be restarted^[source]	2010–present^[source]

In commission	1980–present^[source]	2022–present^[source]

Planned	20 (2 949, 18 949A)^[source]	5 (1 nuclear)^[source]

Completed	14 (2 949, 11 949A, 1 09852)^[source]	4^[source]

Canceled	6 (2 incomplete, 4 never laid down)^[source]	—

Active	6 (modernization of some boats to 949AM)^[source]	3^[source]

Laid up	2^[source]	—

Lost	1^[source]	—

Retired	5?^[source]	—

Type	Nuclear-powered cruise missile submarine^[source]	Attack submarine^[source]

Endurance	120 days^[source]	—

Test depth	600 m^[source]	400 m (1,300 ft)^[source]

Armament	4 × 533 mm (21.0 in) and 2 × 650 mm (26 in) torpedo tubes in bow 28 × 533 mm and 650 mm weapons, including RPK-2 Vyuga (SS-N-15 Starfish) anti-submarine missiles with 15 kt nuclear warheads and RPK-6 Vodopad/RPK-7 Veter (SS-N-16) anti-submarine missiles with 200 kt nuclear warhead or Type 40 anti-submarine torpedo or 32 ground mines 24 × P-700 Granit (SS-N-19 Shipwreck) cruise missiles with 750 kilograms (1,650 lb) HE or 6 × 100 Mt Poseidon nuclear-powered, nuclear-armed drones^[source]	6 × 533 mm (21 in) torpedo tubes : 8 × SM39 Exocet anti-ship missiles 18 × F21 heavy-weight torpedoes 30 × naval mines^[source]

Alternative designation	Oscar II^[source]	—

Country of origin	Soviet Union^[source]	—

Cost	—	US$ 1 billion per unit (diesel-electric) US$ 3.8 billion per unit (nuclear)^[source]

Building	—	1^[source]

Sensors & processing systems	—	Naval Group SUBTICS combat management system Thales TSM 2233 Eledone hull and flank array passive sonar Thales Safare/S-Cube hull active sonar Safran Series 20 target identification and classification system^[source]