The Infiniti FX will cost from £42,600 when it goes on sale in September.
The base FX37 GT is powered by a 316bhp petrol V6, which accelerates from 0-62mph in 6.8sec and has a top speed of 145mph. It has 266lb ft of pulling power and averages 23.4mpg, emitting 282g/km of CO2. A seven-speed semi-automatic gearbox is fitted as standard.
The mid-range FX37S costs from £44,600. For the additional £2000 buyers get Continuous Damping Control, an electrically-adjustable driver's seat, sports front seats, 21-inch alloy wheels, performance tyres and a dark chrome extrerior trim.
The range-topping FX50S will cost from £53,800. That £9200 premium over the FX37S adds a 385bhp 5.-litre petrol V8, rear active steering, around view cameras, cruise control, intelligent brake assist and a tyre pressure monitoring system.
The V8 has 369lb ft of torque, accelerating the FX50 from 0-62mph in 5.8sec and on to a limited top speed of 155mph. It averages 21.7mpg and produces 310g/km of CO2.
Buyers also get Infiniti's Connectiviti+ package as standard, which includes a 30GB hard disk sat-nav, an eight-inch touchscreen display, 10GB of music storage and a DVD player.
Other options for the FX range include around view cameras (£850), a sat-nav system (£1700) and a Bose sound system (£600).
Infiniti also says that it will offer customers an unrivalled sales experience. It describes its showrooms as having "the ambience of a boutique hotel rather than a traditional car showroom."