Rome's stations line the GRA (Grande Raccordo Anulare), the A90 ring that circles the city, where Eni, Q8 and IP sites are easy to reach without entering the ZTL restricted zones downtown. GPL and metano are widely available for bi-fuel cars.
Only 109 of the 901 stations mapped in Rome say whether they sell diesel. The rest probably do; nobody has recorded it. See Rome on the map →
Plan your stop
In Rome the filters that actually narrow things down are diesel (109), LPG (86), CNG (34) and CCS charging (6). Travelling at night, switch on "open now": 97 places are tagged 24/7. When you arrive, a quick confirmation keeps the map right for the next driver in Rome.