Navalyze · Ro-pax · Ship

GNV ALLEGRA

IMO: 8506311
Type: Ro-pax ship
Port of registry: Genoa
Technical efficiency: EIV 30.90 g CO₂/t·nm
Ice class: IB
Former names: OSCAR WILDE

ISM company (DoC holder) in 2025: Grandi Navi Veloci Spa

Report year

2025 at a glance

From the 2025 THETIS-MRV report.

Fuel per mile

183.3 kg/nm

Ro-pax median 150.2 kg/nm (+22%)

CO₂ per transport work (pax)

898

g CO₂/pax·nm · Ro-pax median 567 (+59%)

CO₂ per transport work (freight)

0.12

g CO₂/t·nm · Ro-pax median 253 (−100%)

Average speed

16.3 kn

Ro-pax median 15.8 kn (+3%)

Fuel per day at sea

71.8 t/day

Fuel consumed

8,470 t

CO₂ emitted

26,728 t

27,144 t CO₂eq incl. CH₄ and N₂O

Distance sailed

46,206 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,829 h

118 days, 32% of the year

Within the ro-pax fleet, 2025

Set against all 408 ro-pax ships with a full-year 2025 report. Bigger ships burn more per mile but less per tonne of cargo, so read fuel per mile with the ship's size in mind.

Fuel per mileThis ship 183.3 kg/nm · median 150.2 (+22%)

69.3Ranks 301 of 408, lowest first232.4

Average speedThis ship 16.3 kn · median 15.8 (+3%)

12.0Faster than 56% of ro-pax ships22.3

CO₂ per transport work (pax)This ship 898.04 g CO₂/pax·nm · median 566.51 (+59%)

66.76Ranks 275 of 408, lowest first1,568.87

CO₂ per transport work (freight)This ship 0.12 g CO₂/t·nm · median 253.18 (−100%)

48.59Ranks 8 of 408, lowest first1,247.19

Middle 80% of shipsMiddle 50%Ro-pax medianThis ship

Where the emissions happen, 2025

THETIS splits each ship's CO₂ by voyage type. The split sets how much falls under the EU ETS: all of it within the EU and at berth, half of it on voyages into or out of the EU.

Between EU ports80%
From the EU0%
Into the EU0%
At berth in the EU20%

78% of this ship's CO₂ falls under the EU ETS (20,742 t).

Fuel burned laden

–

Not reported

CO₂ at berth

19.6%

Alongside in EU ports

Methane (CH₄)

0.4 t

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

1.016

Uplift from CH₄ and N₂O, counted in full from 2026

Over the years

Full-year reports only. The Ro-pax median is the middle ship of all ro-pax ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel per mile, kg/nm

GNV ALLEGRA
Ro-pax median

140.0160.0180.0200.0

’182018’192019’202020’212021’222022’232023’242024’252025

Average speed, kn

GNV ALLEGRA
Ro-pax median

15.016.017.018.0

’182018’192019’202020’212021’222022’232023’242024’252025

CO₂ per transport work (freight), g CO₂/t·nm

GNV ALLEGRA
Ro-pax median

0.0200400600

’182018’192019’202020’212021’222022’232023’242024’252025

CO₂ per transport work (pax), g CO₂/pax·nm

GNV ALLEGRA
Ro-pax median

0.05001,0001,500

’182018’192019’202020’212021’222022’232023’242024’252025

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2024→2025	−0.4 kn	+1%	−1%	−11%	+36,258%	0.4 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2023→2024	−0.9 kn	+1%	−4%	−23%	−100%	0.9 kn slower, fuel per mile flat; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+0.2 kn	+0%	+1%	+11%	−15%	Same speed, fuel per mile flat.
2021→2022	−0.5 kn	+8%	+6%	+99%	+40%	0.5 kn slower, fuel per mile up 8%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+0.1 kn	−3%	−3%	+3%	−21%	Same speed, fuel per mile down 3%; in line with the speed change.
2019→2020	+0.2 kn	−13%	−12%	−37%	−8%	Same speed, fuel per mile down 13%; better than speed alone explains (hull, engine or trade).
2018→2019	+1.4 kn	+16%	+26%	−48%	+44,803%	1.4 kn faster, fuel per mile up 16%; in line with the speed change.

Fuel per mile rises roughly with the square of speed for a given ship, so a change in speed explains much of a change in fuel per mile.

Every reporting year

One row per THETIS-MRV report. A ship that changed operator during a year has a part-year report for each.

Operation

Year	ISM company	Fuel t	CO₂ t	Distance nm	At sea h	Speed kn	Fuel kg/nm	CO₂ g/t·nm	Laden fuel
2025	Grandi Navi Veloci Spa	8,470	26,728	46,206	2,829	16.3	183.3	–	–
2024	Grandi Navi Veloci Spa	9,417	29,628	52,097	3,115	16.7	180.8	–	–
2023	not published	12,146	38,095	67,895	3,849	17.6	178.9	–	–
2022	not published	10,966	34,425	61,330	3,516	17.4	178.8	–	–
2021	not published	5,098	16,121	30,882	1,726	17.9	165.1	–	–
2020	not published	5,111	16,035	29,942	1,682	17.8	170.7	–	–
2019	not published	9,307	29,131	47,511	2,703	17.6	195.9	–	–
2018	not published	15,344	48,389	91,034	5,611	16.2	168.6	–	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/pax·nm	Ro-pax median	vs Ro-pax	Rank	Freight, g CO₂/t·nm	Ro-pax median	vs Ro-pax	Verifier	Methods
2025	Grandi Navi Veloci Spa	898.04	566.51	+59%	275 of 408	0.12	253.18	−100%	RINA	A+B
2024	Grandi Navi Veloci Spa	2.47	546.68	−100%	19 of 404	2.47	232.85	−99%	RINA	A+B
2023	not published	903.94	680.04	+33%	243 of 386	150.17	233.94	−36%	RINA	A+B
2022	not published	1,063.69	626.32	+70%	282 of 394	185.86	252.90	−27%	RINA	A+B
2021	not published	760.29	815.19	−7%	180 of 377	415.04	226.00	+84%	RINA	A+B
2020	not published	956.68	750.91	+27%	216 of 387	170.05	217.49	−22%	RINA	A+B
2019	not published	1,037.27	569.03	+82%	296 of 394	118.23	222.56	−47%	RINA	A+B
2018	not published	2.31	728.92	−100%	18 of 361	3.04	184.05	−98%	Lloyd's Register	B

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Ro-pax ships are benchmarked on CO₂ per transport work (pax) (TW), in g CO₂/pax·nm, and also per tonne of freight (g CO₂/t·nm freight). CO₂eq adds methane and nitrous oxide and is in the public files from 2024. Rank counts from the lowest figure among that year's ro-pax ships. Methods: A delivery notes, B tank monitoring, C flow meters, D direct measurement. FuelEU GHG intensity is not shown: it needs fuel types, which the public file does not carry. Operators are named only from 2024, the first year the public files carry them; earlier years belong to the ship, not to any company.