Bell 412epi vs Leonardo Aw139 vs Robinson Helicopters R66 vs Sikorsky S 76d

The Bell 412EPi and Leonardo AW139 sit in the medium, twin‑engine utility category, while the Sikorsky S‑76D is a twin‑engine intermediate helicopter optimized more for executive and offshore missions. The Robinson R66 is a light, single‑engine helicopter aimed at lower‑cost private, training, and light utility use. In range, the AW139 and S‑76D generally lead among these four, commonly offering roughly 500–800 nautical miles depending on configuration and reserves, making them strong choices for longer legs. The Bell 412EPi is typically mid‑pack, often around the 350–450 nautical mile class for practical missions. The R66 is shorter‑range by comparison, commonly around 300–350 nautical miles, again varying with payload and fuel. Passenger capacity follows size and role. The R66 is a 5‑seat aircraft including the pilot, so it usually carries up to four passengers. The Bell 412EPi commonly carries around 10–13 passengers in utility seating. The AW139 typically accommodates about 12–15 passengers. The S‑76D often seats around 8–12, with many executive layouts favoring fewer, more spacious seats.