Airbus Helicopters H155 vs Airbus Helicopters H160 vs Leonardo Aw139 vs Sikorsky S 76d

All four are twin‑engine, medium-class helicopters commonly used for offshore transport, corporate/VIP, EMS, and public service, but they differ in cabin size and typical mission reach. The Airbus H155 sits in the light‑medium segment, generally carrying about 8–12 passengers and offering a practical range in the roughly 450–650 km class depending on fit and reserves. The Airbus H160 is a newer-generation medium helicopter with a roomier, quieter cabin and typically similar passenger counts (about 8–12), but with improved efficiency; its typical range is often around 600–850 km. The Leonardo AW139 is a higher‑capacity, medium twin frequently configured for about 12–15 passengers (and can be arranged for more in high-density layouts), with range commonly in the ~700–1,000 km bracket. The Sikorsky S‑76D is a well-known corporate/offshore medium twin, typically seating about 8–12 passengers, with range often around 650–850 km. Exact figures vary significantly with interior, fuel, payload, weather, and regulatory reserves.