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On the road, the Saturn Aura behaves like a European family sedan. It has a taut feel with good steering quality and an overall impression that the brakes, suspension and powertrain are in agreement with each other. This is not surprising, given the car's structural roots, which are shared with the fine-driving Saab 9-3 and Opel Vectra.The standard engine is a 2.4-liter four, essentially the same 16-valve, dual-overhead-cam (DOHC) Ecotec unit that GM uses in the Chevrolet Cobalt and Malibu, albeit with detail differences. Another version of this 2.4-liter engine powers the Aura Hybrid, where it is rated 164 horsepower at 6400 rpm, and 159 pound-feet of torque at 5000. In the hybrid it is coupled with a 4kW (about 5.4 horsepower) electric motor and a conventional four-speed automatic transmission. Saturn emphasizes the low initial cost of this setup, noting that, like other hybrids, the Aura saves fuel by shutting off its engine while idling and during deceleration, and by using regenerative braking to recharge the 10kW nickel-metal hydride battery. Note the Aura Hybrid's gasoline engine is much more powerful in proportion to its electric motor than that in the 2009 Toyota Prius (76 horsepower gasoline, 67 horsepower electric) or Honda Civic Hybrid (110 horsepower gas, 20 horsepower electric). The Aura Hybrid's electric motor also develops significantly less torque for low-speed acceleration (44 pound-feet, against 76 for the Civic and a whopping 295 for the Prius). This suggests that the Aura Hybrid will depend more on its gasoline engine and less on its electric motor than the hybrid imports. That said, with 159 pound-feet of torque available from its gas engine alone, the Green Line should be able it uphold its honor in any traffic situation. The XR V6's 252-hp, 3.6-liter V6 is strong and relaxed in character, thanks to its sophisticated engineering, with four valves per cylinder and variable valve timing. Like the four-cylinder models (except the Hybrid), the 3.6-liter comes with a six-speed automatic featuring Tap-Shift paddles on the steering wheel to make manual shifting faster and more convenient. Fuel economy with the V6 is an EPA-rated 17/26 mpg City/Highway. The fully independent suspension on the Aura splits the difference between ride quality and handling, both of which are quite good. While handling feels much like that of the Saab 9-3 with which the Aura shares its architecture, the ride quality is more like that of a Toyota Camry, known for its smoothness. Furthermore, thanks to the use of sound-deadening materials everywhere from the firewall to the side glass and wheelwells, the Aura's interior is near-silent even at speeds over 75 mph. The hydraulic variable-ratio power steering is well weighted at highway speeds, offering plenty of road feel; while with just 2.8 turns lock-to-lock, it's plenty helpful in low-speed parking-lot maneuvers. Offsetting that, however, is a particularly wide 40.4-foot turning circle. The Hybrid features its own, unique electronic power steering system. All Aura models feature four-wheel disc brakes with ABS. We found they felt good and worked well in normal driving. All Auras come with traction control, and, for 2009, StabiliTrak as well, GM's excellent electronic stability control system.
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