[3][4] The Plus Four is the second model, after the Plus Six, to be developed on Morgan's new bonded aluminium "CX-Generation" platform but, like its predecessor, it is assembled with an ash timber frame.

[3][5] It is powered by an original 1,998 cc (2.0 L; 121.9 cu in) BMW TwinPower petrol engine producing 259 PS (190 kW; 255 hp) and 350 N⋅m (258 lb⋅ft) of torque when combined with the 6-speed manual transmission and 400 N⋅m (295 lb⋅ft) of torque with the 8-speed automatic transmission.

[6][7] Morgan announced that after the Plus Four will be sold at the company's twelve United States dealerships for the 2025 model year.

Under a federal 'replica car' rule via the Fixing America's Surface Transportation Act, sales will be limited to 325 cars per year in order to legally circumvent federal safety regulations.

Only the automatic transmission will be available for US buyers, as the manual will require a different calibration to meet California Air Resources Board emission standards.