It’s been just over a year since the current Subaru Legacy received a facelift, and now the next-generation Subaru Legacy has been spotted undergoing road tests in Detroit, United States, and is set to use the new Subaru Global Platform.

Set to debut next year as a 2020-year model, the Subaru Legacy is likely to adopt the 2.5 litre direct-injection petrol engine which made its debut in the 2019 Subaru Forester in March. A 2.0 litre turbocharged petrol four is also said to be likely, and both will replace the 3.6 litre naturally-aspirated six-cylinder boxer. For reference, the 2.5 litre mill produces 182 hp and 239 Nm of torque in the 2019 Forester.

Lean-burn technology and cylinder deactivation are both also expected to feature in the upcoming Legacy. As for the model spotted here, the Japanese automaker’s all-wheel drive powertrain layout is expected to remain, as can the CVT transmission from before, though it remains to be seen whether or not the Legacy will gain the Active Torque Vectoring system fitted to the WRX and WRX STI.

The equipment list is too early to tell at this point, though it can be expected to feature most, if not all of the company’s innovations. These – on the 2019 Forester – include the EyeSight driver assistant system for the full suite of active driver aids, including Lane Keep Assist, Pre-Collision Throttle Management and Lead Vehicle Start Alert.

A concept can be expected to preview the production version of the forthcoming Legacy, though from what we can gauge of this test mule, the new model will be an evolution of the current car, rather than a revolution. Great news perhaps if you love the current design language; what do you think, dear readers?