Calculating engine's displacement

General Chat
1

Yesterday I was trying to build the same 1.6L T-GDI Gamma engine my car has. According to wikipedia, the bore and stroke are 85.4 mm × 77.0 mm. Now, when I put those parameters into Automation, the total volume comes back as 1764cc engine. At first, I thought the Automation has it wrong, so I did the calculation myself:

Volume of cylinder = pi * (85.4/2)^2 * 77.00 = 441058.654 mm^3
Volume of 4 cylinders = 441058.654 * 4 = 1764234.62 mm^3 or 1.764 L.

So the game calculation seems to match mine. So my question is this, are the given bore/stroke values wrong, or engine’s displacement is calculated differently?

2

Wikipedia is wrong, your calculation and the game are correct. :slight_smile: On Wikipedia, bore and stroke are given the other way around (on the German page it’s right). If you choose 77 mm bore and 85.4 mm stroke (that’s how the engine really is built), you get 1591cc.

3

Thanks :slight_smile: I haven’t noticed it, even though I looked the referenced pdf (which got it right, bore is 77mm). Shame on you, anonymous Wikipedia editor!