Westland 30 Series 100
Powered by two 846 kW (1,135 shp) Rolls-Royce Gem Mk 41-1 turboshaft engines.
14 built.

Westland 30 Series 100-60
Powered by two 940 kW (1,260 shp) Rolls-Royce Gem 60-3 turboshaft engines.
Also known as the Series 160.
24 built.

Westland 30 Series 200
Single aircraft powered by two 1,276 kW (1,712 shp) General Electric CT7-2B turboshaft engines.
 Variant first flew in 1983.

Westland 30 Series 300
Proposed variant in 1986 with a General Electric CT7 or Rolls-Royce Turbomeca RTM 322 engine.
 Its maximum takeoff was increased and featured composite BERP rotor blades, reduced noise, and a glass cockpit as an option.
Single aircraft.

Westland 30 Series 400
Proposed variant powered by Rolls-Royce Turbomeca RTM322 engines; not built.

TT30
Proposed tactical military transport version.
One prototype modified to this configuration.

TT300
Proposed tactical military transport version with 17 seats.
Westland 30 Series 100
Powered by two 846 kW (1,135 shp) Rolls-Royce Gem Mk 41-1 turboshaft engines. 14 built.
Westland 30 Series 100-60
Powered by two 940 kW (1,260 shp) Rolls-Royce Gem 60-3 turboshaft engines. Also known as the Series 160. 24 built.
Westland 30 Series 200
Single aircraft powered by two 1,276 kW (1,712 shp) General Electric CT7-2B turboshaft engines.  Variant first flew in 1983.
Westland 30 Series 300
Proposed variant in 1986 with a General Electric CT7 or Rolls-Royce Turbomeca RTM 322 engine.  Its maximum takeoff was increased and featured composite BERP rotor blades, reduced noise, and a glass cockpit as an option. Single aircraft.
Westland 30 Series 400
Proposed variant powered by Rolls-Royce Turbomeca RTM322 engines; not built.
TT30
Proposed tactical military transport version. One prototype modified to this configuration.
TT300
Proposed tactical military transport version with 17 seats.
Westland 30