The Infiniti Q50S is a sharply styled ride with tautly drawn sheet metal over sporty proportions.

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However, beneath its modern styling this 2015 model hides an aging heart.

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Behind the infinite-horizon badge breathes the same 3.7-liter engine that's powered this automaker's sport sedans since 2008.

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Old it may be, but the VQ37VHR engine is no slouch. Output is stated at 328 horsepower and 269 pound-feet of torque.

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The Q50 is available in either all-wheel or rear-wheel drive configurations.

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Power flows through a seven-speed automatic transmission on its way from the engine to the asphalt.

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Even laden with older tech, the Infiniti doesn't slack in the safety tech department.

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The Q50 features forward-facing radar, side-firing sonar sensors and cameras pointed in all four directions.

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The side cameras, front and rear, are used at low speeds as parking aids.

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You can select forward, side and rear views, as well as the automaker's Around View camera, which combines all four angles into a bird-eye look at the area around the car.

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The Q50 is also outfitted with optional adaptive cruise control, forward precollision intervention, blind-spot monitoring and assist, and other features.

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Infiniti was the first to market with many of these features, so their appearance in the Q50 is no surprise.

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Infiniti's dashboard tech features a two-screen setup: an upper 8-inch screen stacked atop a 7-inch secondary display.

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The upper touchscreen operates with resistive sensitivity and is the main display for navigation.

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The lower display is a capacitive touch screen that is used to control secondary functions, such as choosing audio sources, climate controls and Infiniti's apps integration.

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A display in the center of the instrument cluster showcases the status of the driver aid systems, fuel economy and trip info.

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The seven-speed automatic transmission features paddle shifters mounted on the steering column.

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One feature that I liked was the ability to quickly toggle the various driver aid technologies with a single press of the button that looks like a car surrounded by a forcefield.

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Through Infiniti's menu system, the steering weight and responsiveness can be individually tuned to the driver's preference.

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In addition to the two touchscreens, the Q50 also features a physical control knob and steering-wheel controls that both affect the upper display's functions. I think that's just too many control options to master.

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The gearbox and engine's performance are affected by the Q50's four driving modes: sport, normal, comfort and custom.

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The cabin is quite spacious, with a double-arc design that bends the dashboard away from and around the front seats' occupants.

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The information display does a good job of letting the driver know what systems are active, but not of giving information about what those systems are doing.

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With push-button start and intelligent keyless entry, the driver doesn't have to remove the fob from his or her pocket before hitting the road.

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A suite of connected features and apps boosts the dashboard's functionalities, but lags behind the newer competition.

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Most of Infiniti's "apps" are simple things like a compass, clock and performance meter.

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Though aging, the 2015 Q50S is still a solid alternative for sport sedan drivers.

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Thankfully, Infiniti is giving the Q50 a much-needed update for the 2016 model year with a new line of more powerful and efficient engines. We can't wait.

Caption by / Photo by Antuan Goodwin/CNET
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