For 2018, Infiniti’s mid-size sedan received revised body styling to make it more aggressive looking, which is what buyers in the entry luxury class prefer. In particular the Sport and Red Sport models got their own distinctive look that differs from the other trims. The interior was also refreshed with higher-quality materials for upper-range versions. The turbocharged four-cylinder (courtesy of Mercedes-Benz) installed in the base Q50 puts out a modest 208 horsepower, while the available twin-turbocharged V-6 puts out 300 horsepower, or 400 in the Red Sport model. (The 360-horsepower hybrid has been deleted from the lineup.) Both engines are mated to seven-speed automatic transmissions and all models can be upgraded to all-wheel-drive. An interesting Q50 option is Direct Adaptive Steering (DAS), also referred to as steer-by-wire. It allows drivers to determine steering ratio and steering effort by selecting from Standard, Sport, or Sport-Plus modes. As well three additional adjustments in either of the latter two settings can further fine-tune the steering. Forward collision warning with emergency braking is now standard on all models.

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