| Class | 
Shields | 
Hull | 
Armor | 
SIF | 
| Type | 
Capacity | 
| D'Deridex Class
 | 
Standard | 
2,295,000 | 
Standard Duranium / Tritanium Double | 
11 cm High density | 
Standard | 
| Early Bird of Prey
 | 
- | 
- | 
Standard Monotanium Single | 
1 cm Polarised | 
Standard | 
| Narada
 | 
- | 
- | 
    | 
- | 
- | 
| Norexan Class
 | 
Standard | 
3,240,000 | 
Heavy Duranium / Tritanium Double | 
8 cm High density | 
High | 
| Romulan Bird of Prey
 | 
 | 
40,500 | 
Light Monotanium Single | 
- | 
Low | 
| Romulan D7 Class
 (Klingon import, figures for 2265) | 
Standard | 
81,000 | 
Heavy Monotanium Double | 
5 cm High density | 
Standard | 
| Romulan Science ship
 | 
Standard | 
67,500 | 
Standard Duranium / Tritanium Single | 
2 cm High density | 
Low | 
| Romulan Scout
 (Modified Science ship) | 
Standard | 
67,500 | 
Standard Duranium / Tritanium Single | 
2 cm High density | 
Low | 
| Scimitar Class
 | 
Primary and secondary [1] | 
2,160,000 | 
Standard Duranium / Tritanium Double | 
9 cm High density | 
Standard | 
|   | 
| Class | 
Shields | 
Hull | 
Armor | 
SIF | 
| Type | 
Capacity | 
| Romulan Shuttle
 | 
Standard | 
40,500 | 
Light Duranium Single | 
- | 
Low | 
| Scorpion Class
 | 
- | 
- | 
    | 
- | 
- |