Here are the Alfa specs:
Laid down:
1974 Launched:
1977 Commissioned:
1977 General Characteristics Displacement: 2300 tons surfaced, 3200 tonnes submerged Length: 81.4 metres Beam: 9.5 metres Draught: 7.6 metres Propulsion: OK-155 or BM-40A, 155-MWt
Lead cooled fast reactor
40000 shp steam turbine, one shaft Speed: 18-24 knots surfaced, 43-45 knots submerged Depth: 800 m test, 1300 m crush Complement: 27 officers, 4 petty officers Armament: Six 533-mm (21-inch) torpedo tubes:
18
SET-65 or
53-65K torpedoes
20
VA-111 Shkval torpedoes
21
SS-N-15 cruise missiles
12
SS-N-16 cruise missiles
24
mines
1300 meters = 4265 feet (That is deep)
45 knots is damn fast too. that is just barely over 51 MPH. Getting close to torpedo territory.