Spots going fastNorwegian Sun vs Sirena
Side-by-side cruise ship comparison · Updated April 2026
Norwegian Sun is the significantly larger vessel at 78,309 GT — 159% more than Sirena's 30,277 GT. Built in 2001, Norwegian Sun is 2 years newer — an advantage for travellers seeking modern amenities and design. Sirena edges ahead in service with a passenger-to-crew ratio of 1.7:1, meaning more crew per guest.
Score: 5 – 2
Quick Compare
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Category
Norwegian Sun
Sirena
Size
78,309 GT
30,277 GT
Passengers
1,936
684
Year Built
2001
1999
Crew Ratio
1:2.1
1:1.7
Space Ratio
40.5
44.3
Decks
—
—
Length
258m
181m
From Price
$1,385/pp
—
Comparison Verdict
Norwegian Sun is the significantly larger vessel at 78,309 GT — 159% more than Sirena's 30,277 GT. Built in 2001, Norwegian Sun is 2 years newer — an advantage for travellers seeking modern amenities and design. Sirena edges ahead in service with a passenger-to-crew ratio of 1.7:1, meaning more crew per guest.
| Category | Winner |
|---|---|
| Size | Norwegian Sun |
| Capacity | Norwegian Sun |
| Modernity | Norwegian Sun |
| Service | Sirena |
| Spaciousness | Sirena |
| Decks | Tie |
| Length | Norwegian Sun |
| Fleet Power | Norwegian Sun |
Bottom line: Norwegian Sun leads 5–2 across our categories — strongest in Size. Choose Norwegian Sun for overall superiority; pick Sirena if its strengths matter more to you.
Which Ship Is Right for You?
Choose Norwegian Sun if...
- You want the newer ship (built 2001, 2yr newer)
- Size matters to you (78,309 GT)
- More onboard variety (1,936 guests)
Choose Sirena if...
- Better service ratio (1.7:1 crew ratio)
- More space per guest (44.3 GT/pax)
You've compared the ships. Now see what they cost.
See Current Prices
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Sailing Prices
| Norwegian Sun | Sirena | |
|---|---|---|
| Cheapest | $1,385 pp | — |
| Departing | Aug 22 | — |
| Duration | 7 nights | — |
| View Deal |
Prices from Cruisebound. We may earn a commission at no extra cost to you.
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Frequently Asked Questions
How is the comparison score calculated?
We compute scores across 8 categories using real spec data — gross tonnage, passenger capacity, crew capacity, year built, length, deck count, space ratio, and fleet power. Each category awards one point to the winning ship.
What is the space ratio and why does it matter?
Space ratio is gross tonnage divided by passenger capacity. A higher number means more space per guest. Luxury lines typically score above 40; mass-market ships often fall in the 30-40 range.
What does the passenger-to-crew ratio mean?
Passengers per crew member. Lower is better — more staff per guest means better service. Luxury lines aim below 2:1; large mainstream ships may be 3-4:1.
Are the prices shown accurate?
Prices are sourced from Cruisebound and reflect real-time availability. They may change based on cabin type, date, and demand. Click through to see the latest fares.
Can I compare more than two ships?
Yes — up to four ships. Use the search tool on the compare hub page to add additional ships.
How current is the ship data?
Specifications come from our database of 380+ vessels, revalidated every 5 minutes via ISR. The "Updated" timestamp shows when records were last modified.
