The Chevrolet Impala is our pick for interior space. Its offers a flowing, modern take on the passenger cabin. Both front and rear passengers can enjoy spacious seating arrangements. Tall adults will feel completely comfortable in any of the Impala's seats. In back, drivers can fill 18.8 cubic feet of cargo space with everyday items.

When it comes to interior space, the Ford Taurus finishes as a strong second. The upscale cabin offers luxurious options like a heated steering wheel and massaging front seats. At highway speeds, the cabin remains quiet and the ride is always comfortable. The driver seat offers generous support for long commutes.

The 2015 Ford Taurus is our pick for convenience features. The standard lineup includes high-tech items to keep drivers informed and passengers entertained. Sync voice controls mean drivers can browse infotainment options without compromising safety. Bluetooth phone and audio connectivity lets drivers make hands-free calls or stream music. Keyless entry saves time in the parking lot.

When it comes to features, the Chevrolet Impala isn't far behind. It standard features also help drivers stay connected. Notably, its OnStar technology comes with a standard 4G LTE Wi-Fi connection that lets passengers stay connected on the go. Users can interact with apps on the standard 4.2-inch color display or the optional 8-inch touchscreen.

The 2015 Ford Taurus protects passengers with sturdy modern safety features. Items like antilock disc brakes and stability and traction control are standard across the board, giving drivers greater control over bad road conditions. The standard rearview camera helps drivers back up as safely as possible. The Taurus also comes with Ford's MyKey technology, which lets owners set speed limitations for secondary drivers like valets or teens. On higher trim models, shoppers can add a variety of high-tech systems designed to increase driver vigilance. A pre-collision warning system alerts drivers to impending accidents and automatically applies the brakes to mitigate potential damage. Lane-keeping assist helps drivers stay between the lines.

In this category, the Chevrolet Impala is a close runner-up. Its standard OnStar technology helps drivers out of difficult situations with features that include automatic crash notification and an emergency assistance button. Shoppers can add high-tech safety systems for greater on-road protection, including forward collision alert and lane-departure warning.

The 2015 Ford Taurus comes standard with a 3.5-liter V6 engine that produces 288 horsepower and 254 pound-feet of torque. It's mated to a six-speed automatic transmission and front-wheel drive. SEL and Limited drivers can choose to add all-wheel drive. Those who choose front-wheel-drive models can also select the turbocharged 2.0-liter four-cylinder engine. It makes a generous 240 horses and 270 pound-feet of torque. It leads in terms of fuel economy, achieving 22 city/32 highway mpg. The SHO model comes with a turbocharged 3.5-liter V6 for the line's maximum output, 365 horses and 350 pound-feet of torque. All-wheel drive is standard for the SHO. Its six-speed automatic transmission is equipped with paddle shifters, giving drivers greater control over the ride. Perhaps unsurprisingly, the SHO is incredibly quick on its feet.

The Chevrolet Impala's base engine is a 2.5-liter four-cylinder that makes 195 horses and 187 pound-feet of torque. It's equipped with a start-stop system that shuts the engine off when the Impala is stopped in traffic, helping the Impala achieve 22/31 mpg. Impala LT and LTZ drivers can choose the available 3.6-liter V6. It produces a substantial 305 horses and 264 pound-feet of torque. The Bi-fuel Impala model comes with a 3.6-liter V6 equipped with a CNG tank. This 7.8-gallon tank is good for about 150 miles' worth of around-town driving. When the CNG tank is empty, the engine switches to regular fuel. Drivers can press a button to switch fuel sources at any time. Running on CNG, the V6 produces 230 horses and 218 pound-feet of torque.