NB//V8 engine code numbers are included as of interest in this post
These excluded the unemissionised New Zealand engines. Don Anderson reported some hp ratings for Wheels, but they weren't for all models. Engine codes remained the same as the non NSW state Australian engines
Australian Engine codes generally followed the American engine codes. The sheetmetal variances form stock roundbody US Falcons and Fairmonts were done via the traditional Aussie Letter codes.
XK, 1961-1963, A 60 US Falcon after the project name, XK 2000
XL, a local restyle and re-engineer of the weak suspension
XM, a local rework with additional strenghtening up grades, but aslo the snazzy 2 door Hardtop
XP, a Mercury Comete based body restyle, with very interesting block adaptors to suit the BW 35 auto
XR. Although the 66 Falcon looked American, it was reworked from the Canadain and US Falcons, with subtlely changed tail details by Jack Talenek. At this time, Ford Australia had already changed the engine block casting to a 157 and 160 teeth wide bellhousing quite unlike the 2.77 or 3.03 dual pattern bells of the US engines. The were no major changes from this bellhousing casting from 1966 to 1992, when the last 4.1 engine was sold in the last N-code XF Falcon Utility and Vans.
The 1966-1968 XR engine codes
K = 289 4V, 225 HP, Gold and Silver GT 4-dr and Police Pursuit Falcon engine
I =289 2V, 195 HP
G = 200 1V, 125 HP (seven bearing, wide block, 160 teeth flywheel or flexplate)
E =170 1V, 105 HP (seven bearing, wide block, 160 teeth flywheel or flexplate)
The 1968-1969 XT engine codes
W = 302 4V, 230 HP, Gold and Silver GT 4-dr and Police Pursuit Falcon engine
Y =302 2V, 200 HP
S = 221 1V, 135 HP (seven bearing, wide block, 160 teeth flywheel or flexplate)
B =188 1V, 115 HP (seven bearing, wide block, 160 teeth flywheel or flexplate)
U = Low Compression 221
Q= Low Compression 188
The 1969-1970 XW engine codes
H = 351 4V HO (Windsor or Cleveland 300 hp engine)
T = 351 4V, 290 HP, GT 4-dr and Police Pursuit Falcon engine
Y =302 2V, 200 HP
S = 221 1V, 135 HP (8.425" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
B =188 1V, 115 HP (8.425" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
U = Low Compression 221
Q= Low Compression 188
The 1971 XY engine codes
T = 351 4V HO (Windsor or Cleveland 300 hp engine)
K = 351 4V, 290 HP, GT 4-dr and Police Pursuit Falcon engine
Y = 302 2V, 207 HP
M = 250 2V, 170 HP (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
L = 250 1V, 155 HP (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
G = 200 1V, 135 HP (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
L = 250 1V, 155 HP (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
E = Low Compression 200 1V(9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
The 1971 XY, 72XA, 73-76 XB engine codes
T = 351C 4V HO
K = 351c 4V, 300 HP, GT 4-dr and Police Pursuit Falcon engine
There was a delete option 351 2V 260 hp and 3514V 2v head engine with 290 hp, no codes known
Y = 302C 2V, 240 HP
M = High Compression HC 250 2V, 170 HP (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
L = High Compression HC 250 1V, 155 HP (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
J = Low Compression LC 200 1V(9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
G = High Compression HC 200 1V, 135 HP (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
E = Low Compression LC 200 1V(9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
The 1976-1979 XC engine codes
T = 5.8 Cleveland 4V 2V head 216 hp SAE net dual exhast
P = 4.9 Cleveland 4V 2V head 195 SAE net single exhast, 207 HP SAE net dual exhast
N = High Compression HC 4.1 1V, 123 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
J = Low Compression HC 4.1 1V, 114 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
G = High Compression HC 3.3 1V, 110 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
E = Low Compression LC 3.3 1V 106 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
The 1979-1980 XD engine codes
T = 5.8 Cleveland 4V 2V head 200 hp DIN net single exhast
P = 4.9 Cleveland 4V 2V head 188 hp DIN net single exhast
F = High Compression HC 4.1 1V, 126 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
A or D = Medium Compression MC 3.3 1V 114 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
The October 80 XD engine codes
T = 5.8 Cleveland 4V 2V head 200 hp DIN net single exhast
P = 4.9 Cleveland 4V 2V head 188 hp DIN net single exhast, 207 HP SAE net dual exhast
W =High Compression HC 4.1 1V, 126 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
V = High Compression HC 3.3 1V, 115 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
S = Medium Compression MC 3.3 1V, 110 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
The New South Wales Emmision XD engine codes
H = 5.8 Cleveland 4V 2V head 200 hp DIN net single exhast
B = 4.9 Cleveland 4V 2V head 188 hp DIN net single exhast, 207 HP SAE net dual exhast
W = High Compression HC 4.1 1V, 126 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
L = Medium Compression MC 3.3 1V 106 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
The XE leaded 97 RON engine codes
T = 5.8 Cleveland 4V 2V head 200 hp DIN net single exhast
P = 4.9 Cleveland 4V 2V head 188 hp DIN net single exhast, 207 HP SAE net dual exhast
Y = 4.1 EFI 149 hp DIN net
W =High Compression HC 4.1 2BBL, 131 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
V = High Compression HC 3.3 2BBL, 121 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
L = Medium Compression MC 3.3 2 BBL, 115 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
The New South Wales Leaded RON 97 Emmision XE engine codes* undisclosed HP loss
H = 5.8 Cleveland 4V 2V head 200 hp DIN net single exhast
B = 4.9 Cleveland 4V 2V head 188 hp DIN net single exhast, 207 HP SAE net dual exhast
X = High Compression HC 4.1 1V, 131 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
L = Medium Compression MC 3.3 1V 121 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
The XF leaded 97 RON engine codes
Y = 4.1 EFI 164 hp DIN net
E =High Compression HC 4.1 2BBL, 138 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
V or B = High Compression HC 3.3 2BBL, 121 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
The New South Wales Leaded RON 97 Emmision XF engine codes* undisclosed HP loss
Y = 4.1 EFI 164 hp DIN net(All states same)
X = High Compression HC 4.1 1V, 138 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
L = Medium Compression MC 3.3 1V 115 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
The XF unleaded 91 RON engine codes
Y = 4.1 EFI 164 hp DIN net
N = High Compression HC 4.1 2BBL, 131 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)
V or B = High Compression HC 3.3 2BBL, 119 HP DIN net (9.38" deck seven bearing, wide block, 160 teeth flywheel or flexplate)