Firstly sorry to dig up a 4 year old thread, but I think this post is suitable here.
We all know the space advantage the transverse mounted engine has over the longitudinal and the longitudinal advantage with gearbox mating.
What I'm talking of is the orientation of the engine when mounted transversely.
I'm used to seeing the transversely mounted engines with the intake manifold, injectors near the firewall at the back and the exhaust side at the front behind the front bumper.
But these days I'm seeing a trend of manufacturers opting to mount the engine transversely, with the intake, throttle body, injector rails just behind the front bumper and the exhaust near the firewall.
I am not able to see any major advantage in this design. I've heard few opinions but I'm not entirely convinced. One is by locating the exhaust near the firewall, the distance is lesser for the exhaust gases to travel so more efficiency. But when you observe closely the bend in the exhaust is nearly 90 degrees. The older arrangement seems to be much more smoother curve. The other theory is since the intake side is behind the front bumper it gets cooler air.
According to me this new orientation looks to be a disadvantage. If you have a frontal impact, the intake manifold will be the first to get hit which is more expensive to replace than the headers which may get bent incase of frontal impact. Secondly keeping the exhaust near the firewall with a lot of heat insulation will reduce the AC effect since the firewall will have more heat.
The car's I've noticed so far with this orientation are ANHC, Mitsubishi Outlander, Hyundai i20, Toyota Altis. In the i20 there is a huge cable (accelerator cable) running over the engine from the firewall to the other side throttle body which is an eyesore.
So what are the expert's opinions on this engine layout. Also, any other cars, people have noticed with this layout. |