The North American Corolla is very similar to the international version, except offers revised front and rear styling. This design was adopted from the Furia concept. The Corolla E170 for North America is much larger than the E150, having a wheelbase up to 100 mm longer than the previous generation. North American models were announced first on June 6, 2013; European models, announced the day after, differed mostly outside with its front-end treatment. The media felt the E170 looked smarter, and the interior quality was better, but the engines were closely related to the previous model's, with only slight improvements on performance and emissions.
Two four cylinder engines are available, the 1.8-liter 2ZR-FE with 132 horsepower (98 kW), and a Valvematic equipped 2ZR-FAE offered on the new "Eco" trim providing 140 horsepower (100 kW). The Corolla will be available with a four-speed automatic, six-speed manual, or Toyota's new CVTi-S Continuously-Variable Transmission.
Stylistic elements of this generation of the Corolla were previewed in the Furia concept car shown at the January 2013 Detroit Auto Show. Hints of the swept windshield and sloped roofline suggests the brand will follow the industry trend toward raked rear ends and more aerodynamic body shapes. It is also likely that the elements such as the LED lighting seen on the concept will make it into the next Corolla’s design.
Underbody and floor pan bracing help improve the Corolla platform's structural rigidity.
High-strength steel, extensive testing and computer simulation have helped produce a highly rigid unibody that provides superior safety for its occupants.
Efforts to reduce wind resistance have helped the new Corolla achieve a drag coefficient of Cd=0.28, which places it near the top of the compact-sedan class.
For the E170 Corolla model, the transmission is an electric power steering system offering improved directness and weight, an electric rack and pinion system eliminates an accessory driven hydraulic steering system reducing parasitic loss. The components of the tilt, telescopic steering structure help improve steering rigidity, and reduce vibration. A more structurally rigid intermediate shaft increases the direct feel of steering. Steering measures 3.19 turns total.
The brakes are a 275 mm (10.8 in) ventilated front disc, and a 229 mm (9.0 in) rear drum with the option of a 259 mm (10.2 in) solid rear disc on the S trim. It will feature Toyota's Star Safety System™ standard including Vehicle Stability Control (VSC), Traction Control (TRAC), Anti-lock Braking System (ABS), Electronic Brake-force Distribution (EBD) and Brake Assist. Smart Stop Technology brake-override system will also be included standard, as well as electronic tire pressure monitoring system.
The standard wheels on the L and LE Eco grades are 15-inch covered steel, with 16-inches on the LE and S. Different 16-inch aluminum alloy wheels are offered on the LE, and LE Eco, and 17-inch alloy wheels are offered on the S. The wheels on the LE Eco are low rolling resistance 195/65R-15 rubber. The S 17-inch option offers 215/45R-17 rubber. For the LE, and on the alloy option for the LE Eco model a 205/55R-16 tire is used.
Toyota's new Corolla offers two engine selections, both all aluminium, 1.8 liter inline four cylinder. With the exception of the LE Eco trim, the 1.8 liter engine is equipped with dual Intelligent VVT-i variable valve timing, producing 98 kW (132 hp). The LE Eco model has a 104 kW (140 hp) engine featuring Toyota's Valvematic option, which improves the Eco model's fuel efficiency. Valvematic offers a broader range of continuously variable valve timing (lift and phasing) over VVT-i providing more optimal intake valve (not on exhaust side) operation relative to engine demands conferring a five-percent improvement in fuel economy and engine output. The Eco model's engine also has an increased compression ratio of 10.6:1.
The base model Corolla L is offered with a four-speed automatic transmission or a six-speed manual transmission. The six-speed manual is also available in the Corolla S.
A six-speed manual transmission is available on the Corolla L and S grades. Drive modes that offer re-calibrated throttle, transmission and steering responses are available on the Corolla LE Eco and Corolla S. For ECO drive mode on the LE Eco, the initial throttle inputs are less sensitive to help encourage more fuel-efficient driving and eliminate sudden starts. On the S grade, the SPORT mode software helps make the accelerator pedal feel more responsive to input along with CVTi-S shifting logic that enhances acceleration feel. In sport mode, Corolla's electronic power steering is programmed to offer a more positive steering feel.
For the E170 Corolla model, the transmission is an electric power steering system offering improved directness and weight, an electric rack and pinion system eliminates an accessory driven hydraulic steering system reducing parasitic loss. The components of the tilt, telescopic steering structure help improve steering rigidity, and reduce vibration. A more structurally rigid intermediate shaft increases the direct feel of steering. Steering measures 3.19 turns total.
The brakes are a 275 mm (10.8 in) ventilated front disc, and a 229 mm (9.0 in) rear drum with the option of a 259 mm (10.2 in) solid rear disc on the S trim. It will feature Toyota's Star Safety System™ standard including Vehicle Stability Control (VSC), Traction Control (TRAC), Anti-lock Braking System (ABS), Electronic Brake-force Distribution (EBD) and Brake Assist. Smart Stop Technology brake-override system will also be included standard, as well as electronic tire pressure monitoring system.
The standard wheels on the L and LE Eco grades are 15-inch covered steel, with 16-inches on the LE and S. Different 16-inch aluminum alloy wheels are offered on the LE, and LE Eco, and 17-inch alloy wheels are offered on the S. The wheels on the LE Eco are low rolling resistance 195/65R-15 rubber. The S 17-inch option offers 215/45R-17 rubber. For the LE, and on the alloy option for the LE Eco model a 205/55R-16 tire is used.
Toyota's new Corolla offers two engine selections, both all aluminium, 1.8 liter inline four cylinder. With the exception of the LE Eco trim, the 1.8 liter engine is equipped with dual Intelligent VVT-i variable valve timing, producing 98 kW (132 hp). The LE Eco model has a 104 kW (140 hp) engine featuring Toyota's Valvematic option, which improves the Eco model's fuel efficiency. Valvematic offers a broader range of continuously variable valve timing (lift and phasing) over VVT-i providing more optimal intake valve (not on exhaust side) operation relative to engine demands conferring a five-percent improvement in fuel economy and engine output. The Eco model's engine also has an increased compression ratio of 10.6:1.
The base model Corolla L is offered with a four-speed automatic transmission or a six-speed manual transmission. The six-speed manual is also available in the Corolla S.
A six-speed manual transmission is available on the Corolla L and S grades. Drive modes that offer re-calibrated throttle, transmission and steering responses are available on the Corolla LE Eco and Corolla S. For ECO drive mode on the LE Eco, the initial throttle inputs are less sensitive to help encourage more fuel-efficient driving and eliminate sudden starts. On the S grade, the SPORT mode software helps make the accelerator pedal feel more responsive to input along with CVTi-S shifting logic that enhances acceleration feel. In sport mode, Corolla's electronic power steering is programmed to offer a more positive steering feel.
The unibody makes extensive use of lightweight, high-strength steel to help keep vehicle weight below 2,900 pounds in the interest of fuel economy. In addition to improved collision performance, such construction also gives the Corolla's structure increased rigidity to optimize chassis and suspension performance, giving the new car a more responsive and engaging driving experience.
Toyota is offering a new Continuously Variable Transmission on the LE, LE Eco and S trims, which they claim is more smooth, and improves fuel efficiency named the CVTi-S (Continuously Variable Transmission intelligent-shift). The diameter ratio between small and large internal pulleys has been increased without increasing the unit's case size achieving a ratio range of 6.3, improving fuel efficiency and acceleration. Its forward gear ratio range of 0.396 to 2.480 giving a 4.761 final drive ratio, and a transmission fluid warmer was added reducing warm-up time, and lower viscosity cvt fluid, improving efficiency. Its new fluid-pump reduces parasitic loss at high speeds. The transmission's software creates discrete sequential shift points to emulate traditional transmissions while accelerating. The S trim offers a manual-mode shift gate in the console shifter, or paddle shifters on the steering wheel allowing sequential "shifts" through 7 speeds addressing reports that earlier pulley-type CVTs had a "rubber band" feel when accelerating because of the lag as the transmission entered its power band.
Typical CVT design require high level of hydraulic pressure for operation, and CVT hydraulic-fluid pumps are typically driven at the same rate as engine speed, leading to pumps wasting considerable effort, lowering transmission efficiency at higher engine speeds as the pump moves more fluid than necessary to lubricate and sandwich the CVT's belt. Hydraulic pressure was reduced to an optimal point to protect against belt slippage, while conserving drive effort to limit excess pumping losses in the new design, also, the oil pump features a coaxial 2-port design that enables a 25-percent reduction in pump drive torque lowering its parasitic draw on the engine.
On the LE Eco, the transmission has an ECO or SPORT driving mode, the ECO driving mode makes accelerator control become non-linear to suppress the vehicle's response to choppy driving and contain acceleration from standing start to reduce fuel consumption. The accelerator pedal's communication is the same as Normal-mode after 50-percent throttle, the air conditioning operation is also controlled, with compressor power reduced, and the utilization of recirculation mode, as well as increasing the time to reach a desired temperature.
The S trim offers a SPORT mode with software tuning that alters shift points along with unique electric power steering programming, helps create a sportier driving sensation during normal road and freeway driving. S trim models with CVTs-i have steering wheel mounted paddle shifters, console shifter also offers a manual gate (M-position) that also allows drivers to make brisk upshifts or downshifts using the shift lever. An appropriate shift will automatically be engaged if the engine revolutions become high enough or down shifted if they become low enough.
The front suspension uses Macpherson struts with a new, more rigid control-arm design, the rear has a torsion beam arrangement is used for the rear. The spring rates on Corolla are relaxed, but the S-model equipped with 17-inch wheels includes unique coil, damper, and bushing tuning to offering stiffer handling. The rear torsion beam's attachments points are now fastened to the body at a slanted, diagonal angle for its bushings, a departure from the traditional straight attachment orientation, the new layout contributes improves grip, and stability.
The unibody has been made more rigid, featuring additional unibody bracing (tunnel brace and rear floor brace) to take complement suspension tuning, it makes extensive use of high-strength steel to improve the rigidity of the structure, keeping vehicle curb weight under 2,900 pounds for all grades. High tensile-strength steel allows for reduced thickness and optimized shape of structural panels and increases strength to improving collision performance. Corolla is expected to perform very well in collision safety ratings test.
Vehicle under covers help reduce turbulent airflow, Rear spare wheel well under cover with fins.
Both the LE Eco grade and S grade offer strategically placed vehicle under covers located below the bumper fascia, engine, front floor, rear floor, and fuel tank to help manage airflow under the vehicle for improved efficiency.
Additional leg-room was gained by adopting a slim front seat back. The rear passenger floor was also made flatter by re-routing exhaust pipes beneath the vehicle to offer better middle position foot room. Rear seat comfort is also enhanced with the use of denser urethane pads and foam inserts within the seats.
All models are standard equipped with eight airbags, and Bluetooth hand-free phone and audio-streaming connectivity. The Corolla will be available in four trim levels (L, LE, LE Eco, and S) that offer a wide range of popular features to help distinguish each trim level.
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