After the first place overall in the 1983 Raid Pavia-Venezia, obtained by the 2000 cc outboard catamaran of the Casale Monferrato (AL) pilot Alberto Fioretta, the racer, in the 44th edition, takes a prompt revenge, thanks to the peremptory success of Antonio Petrobelli.
With a great performance the champion from Padua improves the previous limit achieved by Renato Molinari in 1978 who, on board an outboard catamaran of the OZ class, had covered the entire route in 2h 02' 42" achieving an average of 187.286 Km/h. It is worth noting that Petrobelli, who this year takes 1h 58' 55" (and 188.704 Km/h on average), finds his most fearsome opponent in Renato Molinari. As usual, the champion from Como is driving a self-built F1 catamaran powered by the very powerful Evinrude 8-cylinder V-3500 cc with four double-barrel carburetors and a power of around 500 HP at 8500 rpm.
The duel between the two great protagonists takes place on the edge of seconds for most of the race. The red three-point Celli — BPM 8000 cc of Petrobelli stays in the slipstream of Molinari's white hull; the latter, however, due to an engine problem, is forced to leave free waters to the Paduan driver who thus proceeds undisturbed towards victory. The impression that emerges is that in any case Molinari, beyond the unfortunate retirement, would have had to work very hard to win in this circumstance. In the overall standings, behind the winner who for the record also secures the Coppa d'Oro Theo Rossi di Montelera with 173.455 Km/h in the Revere-Pontelagoscuro stretch, we find other racers and more precisely those of Pier Luigi Calderoni, Nicola Malinverni and Ferruccio Araldi, all of the Entrobordo Corsa 2000 cc class. These results reaffirm the validity of these boats in a long and stressful race like the Raid.

After the Pavia-Venezia Petrobelli, confirming the exciting moment he is going through, also wins his fifth Trofeo Due Ponti in Boretto. It should be noted that in the overall standings, in second and third place, we still find two racers of the 2000 cc class and respectively those of Adriano Muggiati and the timeless Francesco Manfredini.

In the circuit races valid for the Italian Championship, the only inboard category to keep interest high is the R3N 2000 cc which, after a somewhat overshadowed 1983 due to the rather low number of participants, is revitalized thanks to some new hulls, such as the catamaran from the Molinari shipyard of Mauro Danini which is added to those already seen by Pecci and Manfredini. Although the catamarans offer good evidence, they do not yet appear capable of prevailing consistently over the fast and less laborious racers. In fact, after two years of alternating performances, the gritty Adriano Muggiati returns to victory with his three-point Lucini and Frigerio-Alfa Romeo and wins the Italian title (the second in his career for this very good driver from Pavia). Surprisingly, at the end of the season, he decided to commission a catamaran from the Renato Molinari shipyard to compete in the 1985 championship.

In 1984, the Italian Championship of the 1000 cc R1 Inboard Race saw only six boats at the start: four catamarans piloted by Brigada, Racconi, Ariante and Saponaro and two three-pointers led by Leidi and Blandino. The title, unfortunately the last one organized for this dissolving class, was won by Pasquale Ariante aboard his Gardin-Selva.