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.