McLaren has confirmed it will add a fourth model to its rapidly growing supercar lineup. Tentatively called the P15, it will bridge the rather wide price chasm between the quarter-million-dollar MP4-12C and $1.15 million P1.

McLaren chief executive Mike Flewitt confirmed with Autocar that the P15 will employ a turbo engine mounted midship in the carbon fiber tub that underpins all modern McLaren road cars.

The engine is assumed to be an advanced version of the 616hp 3.8-liter turbocharged V8 that powers the MP4-12C, but Flewitt says that the car is such a long ways off that technology could very well change by the time it’s ready for production. Pricing for the P15 is estimated at $660,000.