simple engine
thumper
opposed piston opposed cylinder
tune-up
relay cylinder
soup up
engine displacement
downsizing
Carnot's ideal cycle
Carnot cycle
dolly
Otto cycle
steamer
epitrochoidal engine
Wankel rotary engine
twingle
internal-combustion engine
tandem engine
dinky
dinkey
ICE
Wankel engine
compound
diesel multiple unit
hourly rating
single-wheeler
2-6-2
trailer car
double-end
headshunt
souped-up
supercharge
petrol-electric
2-12-2
semiradial
6-2-0
A1A-A1A
bi-mode
0-2-2
hopped-up
idle
road steamer
enginelike
idling speed
motor
2-6-6
electrodiesel
ticking-over
Co-Co
light engine
2-12-0
straight-eight
cab unit
straight engine
top and tail
four-cycle
bimode
shovelnose
external-combustion engine
2-6-0
2-6-4
0-12-0
Rankine cycle
0-8-2
turbocharge
Berkshire
snail
articulated
tender engine
churgle
0-6-2
driving axle
scavenge
entry ignition engine
Mountain
2-10-0
2-4-0
diesel-hydraulic
single-tracking
B-unit
Garratt
propellant
single-track
rotary engine
brake
mill
sidetrack
fire up
microengine
2-2-4
in-line engine
compression
multiengine
engine
shed