## Thursday, November 26, 2009

### Power to Weight Ratio

Bored with 2 wheels writing, let's have some chit chat with 4 wheels.

This is the first time I write about 4 wheels. So, I will start with light writing first. That is "Power to Weight Ratio".

Power to Weight Ratio is very common this days, because it measure actual engine performance. It is the engine Power output divided by the curb weight of the vehicle.

This is the Formula:

P-to-W = P/W

The measurement I use is Watt divided by kilogram.

Now, we are headed to the real 4 wheels specification data. I limit the category into urban compact car that exist in this country, that is Indonesia.

• Yaris

•  Power = 80 kW / 109 ps @ 6000 rpm Displacement = 1,497 cc Gasoline Curb Weight = 1,035 kg (MT)

Source:
Yaris Specification 1
Yaris Specification 2

• Swift

•  Power = 74.5 kW / 100 ps @ 6000 rpm Displacement = 1,490 cc Gasoline Curb Weight = 1,000 kg ST Curb Weight = 1,020 kg GT2

Source:
Swift Specification 1
Swift Specification 2

• All New Jazz

•  Power = 88 kW / 120 ps @ 6600 rpm Displacement = 1,497 cc Gasoline Curb Weight = 1,115 kg

Source:
Jazz Specification

• Livina XR

•  Power = 80 kW / 109 ps @ 6000 rpm Displacement = 1,498 cc Gasoline Curb Weight = 1,117 kg

Source:
Livina XR Specification

• Hyundai i20

•  Power = 74.6 kW / 101.4 ps @ 5500 rpm Displacement = 1,397 cc Gasoline Curb Weight = 1,100 kg

Source:
i20 Specification

• Aveo

•  Power = 63.3 kW / 86 ps @ 5500 rpm Displacement = 1,498 cc Gasoline Curb Weight = 1,055 kg

Source:
Aveo Specification

• Mazda2

•  Power = 76 kW / 103 ps @ 6000 rpm Displacement = 1,498 cc Gasoline Curb Weight = 1,029 kg

Source:
Mazda2 Specification

After we have the fact data, let us calculate the P-to-W data.

• Yaris

•  P-to-W = 80 kW / 1,035 kg = 80,000 W / 1,035 kg = 77.3 W/kg

• Swift ST

•  P-to-W = 74.5 kW / 1,000 kg = 74,500 W / 1,000 kg = 74.5 W/kg

• Swift GT2

•  P-to-W = 74.5 kW / 1,020 kg = 74,500 W / 1,020 kg = 73 W/kg

• All New Jazz

•  P-to-W = 88 kW / 1,115 kg = 88,000 W / 1,115 kg = 78.9 W/kg

• Livina XR

•  P-to-W = 80 kW / 1,117 kg = 80,000 W / 1,117 kg = 71.6 W/kg

• Hyundai i20

•  P-to-W = 74.6 kW / 1,100 kg = 74,600 W / 1,100 kg = 67.8 W/kg

• Aveo

•  P-to-W = 63.3 kW / 1,055 kg = 63,300 W / 1,055 kg = 60 W/kg

• Mazda2

•  P-to-W = 76 kW / 1,029 kg = 76,000 W / 1,029 kg = 73.9 W/kg

This data proved that All New Jazz is the winner followed by Yaris on the second and Swift ST on the third grade.