The 2800's are General Electrics built under licence by Goninans in Townsville Queensland. They are CM30-8's ..... from memory the M stood for modified. So it's a dog bone shaped C30-8 powered by a 12 cylinder 7FDL engine. I've had a cab ride in one and they are fairly quiet. At the time 1997(?) the driver said they were incredibly slow to respond to increases in power. Here's a picture of the chassis of 2808 early in its life at Goninans after it rolled over and went to sleep one day. It was being stripped of any useful bits. Fortunately they were still building new 28's and QR simply bought an additional chassis and other bent parts to make a "rebuilt" 2808. 2805 is behind 2808's chassis getting revised stiffer suspension. Three 2800's have been converted to 4'8" and renumbered as 3200's so if you see them it's the same type of loco.