Official taxi, fixed fareorTAM bus?

The short answer

For one traveler the TAM bus is cheaper by €48. That does not change up to 8 travelers.

The Official taxi, fixed fare is quicker: 45 min against 50 min. The TAM bus varies between 30 and 65 minutes.

Official taxi, fixed fare: Runs all night. TAM bus: 01:30–00:15.

Priced against each other

Whole-party totals · adult fares

What each costs for the whole party, in EUR. The cheaper of the two is marked on every row.
Travelers	Official taxi, fixed fare	TAM bus	Difference
1	€55	€7	€48
2	€55	€14	€41
3	€55	€21	€34
4	€55	€28	€27
5	€110	€35	€75
6	€110	€42	€68
7	€110	€49	€61
8	€110	€56	€54

Side by side

Where each one leaves you

taxi · Comune di Roma licensed taxisOfficial taxi, fixed fare

From: Official taxi rank outside each terminal — white cars, "Comune di Roma" on the door
To: Any address inside the Aurelian Walls
Luggage: Included in the fixed fare.
Runs: All night
Journey: 40–75 min

The fixed fare applies only to licensed Rome city taxis and only within the Aurelian Walls. Drivers touting inside the terminal are not the official rank.

Journey time is the least predictable of any option here; Rome traffic decides it.

Official taxi, fixed fare: price for every party size

TAM · TAMTAM bus

From: Fiumicino Bus Station, Terminal 3 arrivals level — stand 17
To: Roma Termini, Via Giolitti 34
Luggage: One bag per passenger up to 15 kg is included, stowed in the hold; larger or extra bags need their own ticket.
Runs: 01:30–00:15
Journey: 30–65 min

The EUR 7 fare is the Basic ticket, valid only for the booked departure; buying from staff at the stop instead of online costs EUR 9.

Journey time varies with traffic: the timetable allows as little as 30 minutes late at night and up to about 65 minutes in the day.

TAM bus: price for every party size

Check times and book with TAM

This compares two of 14 options. See all of them ranked for your party size

Official taxi, fixed fareorTAM bus?

Priced against each other

Side by side

The other comparisons at Fiumicino