Comparison Lexus IS III (XE30, facelift 2016) 300 (241 Hp) Direct Shift & Kia Optima IV (facelift 2018) 2.0 GDI Turbo (245 Hp) Automatic
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| Brand: | Lexus | Kia |
| Model: | IS | Optima |
| Generation: | IS III (XE30, facelift 2016) | Optima IV (facelift 2018) |
| Engine / modification: | 300 (241 Hp) Direct Shift | 2.0 GDI Turbo (245 Hp) Automatic |
| Production start: | 2016 year | 2018 year |
| Production end: | 2020 year | |
| Coupe type: | Sedan | Sedan |
| Num. of Doors: | 4 | 4 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 12.8 l/100 km | 11.2 l/100 km |
| Fuel consumption / economy - extra urban: | 8.8 l/100 km | 7.8 l/100 km |
| Fuel consumption / economy - combined: | 10.9 l/100 km | 9.8 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.28 | 0.27 |
| Fuel tank volume: | 66 l | 70 l |
| Power: | 241 hp | 245 hp |
| Max power in: | 5800 rpm. | 6000 rpm. |
| Maximum speed: | 230 km/h | |
| Torque: | 350 Nm @ 1650-4400 rpm. | 353 Nm @ 1350-4000 rpm. |
| Model Engine: | 8AR-FTS | |
| Engine position: | Front, longitudinal | Front, transverse |
| Engine displacement: | 1998 cm3 | 1998 cm3 |
| Engine oil capacity: | 4.6 l | |
| Coolant: | 7.8 l | |
| Fuel System: | Direct injection | Direct injection |
| Aspiration / Turbine: | Turbocharger | Turbocharger |
| Position of cylinders: | Inline | Inline |
| Valvetrain: | DOHC, D-VVT-i | DOHC |
| Number of cylinders: | 4 | 4 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10 | 10 |
| Piston Stroke: | 86 mm | 86 mm |
| Cylinder Bore: | 86 mm | 86 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive |
| Number of Gears (automatic transmission): | 8 Direct Shift | 6 |
| Length: | 4681 mm | 4854 mm |
| Width: | 1859 mm | |
| Width with mirrors folded: | 1811 mm | |
| Width including mirrors: | 2027 mm | |
| Height: | 1430 mm | 1466 mm |
| Wheelbase: | 2799 mm | 2804 mm |
| Front track: | 1534 mm | 1598 mm |
| Rear (Back) track: | 1539-1549 mm | 1605 mm |
| Ride height(clearance): | 135 mm | 135 mm |
| Minimum volume of Luggage (trunk): | 306 l | 450 l |
| Front suspension: | Double wishbone | Independent, Spring McPherson, with stabilizer |
| Rear suspension: | Independent, spring multi-link with stabilizer | Independent, spring multi-link with stabilizer |
| Max weight: | 2100 kg | |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 1625 kg | 1614 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Electric Steering |
| Minimum turning circle (turning diameter): | 10.4 m | 10.9 m |
| Tire size: | 225/45 R17; 225/40 R18; 255/35 R18 | 235/45 R18 |
| Wheel rims size: | 7.5J x 17; 8J x 18; 8.5J x 18 | 7.5J x 18 |