The Series I (Tipo AM 101/S) was shown at Salon International de l'Auto 1962 and again at the Salone dell'automobile di Torino in 1963. Employing all but the Maserati 3500's coachwork, it could reach 137 mph (220 km/h) and 0–60 mph in 8.5 seconds on 185x15 Pirelli Cinturato tyres. A Borg-Warner automatic transmission was available, a first for Italian automobiles. When leaving the factory it originally fitted Pirelli Cinturato 205VR15 tyres (CN72). A total of 348 Series I Sebrings were built between 1962 and 1965. The engine was updated in 1963, gaining 15PS for a total of 235 PS (173 kW). The 3700 engine first appeared in 1964, although only a handful of Series I cars were thus equipped.