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

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

Marketing

Dimensons & Outlines

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

Engine

Diesel
4 - Inline, 4 valves per cylinder
Turbo
1685 cc
136 hp
320 Nm
Engine
Fuel
Configuration
Aspiration
Displacement
Power
Torque
Diesel
4 - Inline, 4 valves per cylinder
Turbo
2231 cc
150 hp
340 Nm

Performance (manual gearbox)

manual gearbox - 6 gears
1459 kg
10.3 s
202 km/h
5.7 l/100km
4.4 l/100km
4.9 l/100km
128 g/km
Gearbox type
Vehicle weight
Acc. 0-100
Top speed
Cons. (urban)
Cons. (highway)
Cons. (average)
CO2 emissions
manual gearbox - 6 gears
1520 kg
10.2 s
205 km/h
6.3 l/100km
4.4 l/100km
5.1 l/100km
134 g/km

Performance (automatic gearbox)

automatic - 6 gears
1481 kg
11.6 s
197 km/h
7.9 l/100km
4.9 l/100km
6.0 l/100km
158 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

Expenses

8500 EUR
Price from
7000 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 diesel 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 (front for the KIA and rear in the case of the Lexus). The first one has a Hyundai-engineered powertrain under the hood, a 4-cylinder, 16-valves 136hp unit, while the other one gets its power and torque from a 4-cylinder, 16-valves 150hp engine designed by Toyota.

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. Still, apart from the official crash test results there are other things we need to be aware of. Both vehicles belong to the large family car segment, which is generally a good thing safety-wise, but it doesn't do much to help us decide between the two. On the other hand, taking kerb weight as an important factor into account, the Japanese car offers a marginal difference of 4% 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. That's the official data, while our visitors describe reliability of KIA with an average rating of 4.6, and models under the Lexus badge with 4.9 out of 5. Unfortunatelly, I don't have enough insight that would allow me to comment in more details on the specific models level. Above it all, drivers of cars with the same engine as the Korean car rank it on average as 5.0, while the one under the competitor's bonnet gets 2.7 out of 5.

Performance & Fuel economy

Lexus is a bit more agile, reaching 100km/h in 0.1 seconds less than its competitor. In addition to that it accelerates all the way to 205 kilometers per hour, 3km/h more than the other car. When it comes to fuel economy things look pretty much the same for both cars, averaging around 5 liters of fuel per 100 kilometers (57 mpg), in combined cycle.


Verdict

KIA 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 offering somewhat better performance, just enough to call it quicker. 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. I suggest you spend two more minutes in order to find out which car, based on your needs and budget, would be picked by the virtual adviser, out of 12.000+ vehicles we currently have in our database.

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