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Car #1
Make
Model
Variant
Engine
Car #2
Make
Model
Variant
Engine

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2009. - 2013.
D - Large family car
sedan, 4 door
rear
Badges
Production
Vehicle class
Body style
Wheel drive
Safety
2010. - 2015.
D - Large family car
sedan, 4 door
front

Marketing

Dimensons & Outlines

4585 mm
1800 mm
1440 mm
398 liters
398 liters
65 liters
Length
Width
Height
Boot (min)
Boot (max)
Fuel tank
4845 mm
1830 mm
1455 mm
505 liters
505 liters
70 liters
2009 Lexus IS
2010 KIA Optima

Engine

Petrol
8 - V config, 4 valves per cylinder
Nat. Asp.
4969 cc
423 hp
505 Nm
Engine
Fuel
Configuration
Aspiration
Displacement
Power
Torque
Petrol
4 - Inline, 4 valves per cylinder
Nat. Asp.
2359 cc
175 hp
227 Nm

Performance (manual gearbox)

 
kg
s
km/h
l/100km
l/100km
l/100km
g/km
Gearbox type
Vehicle weight
Acc. 0-100
Top speed
Cons. (urban)
Cons. (highway)
Cons. (average)
CO2 emissions
 
kg
s
km/h
l/100km
l/100km
l/100km
g/km

Performance (automatic gearbox)

automatic - 8 gears
1675 kg
4.8 s
270 km/h
16.8 l/100km
8.3 l/100km
11.4 l/100km
270 g/km
Gearbox type
Vehicle weight
Acc. 0-100
Top speed
Cons. (urban)
Cons. (highway)
Cons. (average)
CO2 emissions
automatic - 6 gears
1562 kg
9.2 s
190 km/h
5.9 l/100km
5.0 l/100km
5.1 l/100km
119 g/km

Expenses

7000 EUR
Price from
8500 EUR

Virtual Adviser's™ opinion

Overview

Two significantly similar cars, no doubt about that. Still, each one has something different to offer. Having both cars powered by petrol engines and utilizing the 4-door sedan body style within the same 'Large family car' segment, the only major difference here really is their wheel drive configuration (rear for the Lexus and front in the case of the KIA). The first one has a Toyota-engineered powertrain under the hood, a 8-cylinder, 32-valves 423hp unit, while the other one gets its power and torque from a 4-cylinder, 16-valves 175hp engine designed by Hyundai.

Safety

The fact that the Lexus got tested by the European New Car Assessment Programme (Euro NCAP), while the other contender didn't, puts it sky-high safety-wise, in my eyes at least. That aside, let's consider some other aspects which affect safety. Both vehicles belong to the large family car segment, which is generally a good thing safety-wise, still it doesn't help us solve our dilemma, does it? Furthermore, taking kerb weight as an important factor into account, the Japanese car offers a marginal difference of 7% more metal.

Reliability

Manufacturers have been building their reliability reputation for decades now and, generally speaking, it appears that Lexus does have a slight advantage, all the models observed together. These are the official statistics, while our visitors describe reliability of Lexus with an average rating of 4.9, and models under the KIA badge with 4.6 out of 5. Unfortunatelly, I don't have enough insight that would allow me to comment in more details on the specific models level. That apart, owners of different cars powered by the same engine as the Japanese car rank it on average as 5.0 out of 5, exactly the same as the other one.

Performance & Fuel economy

Lexus is way more agile, reaching 100km/h in 4.4 seconds less than its competitor. In addition to that it accelerates all the way to 270 kilometers per hour, 80km/h more than the other car. When it comes to fuel economy an obvious choice would be the Korean car, averaging around 5.1 liters of fuel per 100 kilometers (55 mpg), in combined cycle. That's 124% difference compared to the Japanese car!


Verdict

Lexus appears just a bit more reliable, although the difference is truly marginal. The most important thing when deciding between any two vehicles should always be safety, both passive and active. In my opinion, everything taken into account, the Japanese car beats the other contender by far, making it the best choice without even considering other things. It all continues in the same direction, with Lexus outracing its opponent in any situation possible, making it better choice for boy racers. It does come at a cost though, and that's the fuel consumption... All together, there's not much more to say, in this case I wouldn't even consider anything but Lexus. In any case that's my personal view, built upon all the data available to me. What should decide here though is the way you feel about the two vehicles, and I hope you'll find my guidelines useful in the process. Also, you could use the oportunity to find out which car, everything taken into account, would be the perfect choice for you in the eyes of the virtual adviser, among more than 12.000 different ones in our database.

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