I just went to the dealership the other day and decided to pick up (pun not intended) some catalogs of the 4x4 vehicles sold (Patrol, Pathfinder, Pickup, Frontier, X-Trail, Patrol Ute). I decided to transcribe the specs on the catalog of the Frontera (Frontier) pickup below:

The Frontera is almost all new this year here. It changes its name to the U.S. Frontier moniker, with it comes the styling of that same model. Up until now we still had only the old body Frontier being sold here. The versions are as follow:

4x4: Long/Short Bed, Single/Double Cab
4x2: Long/Short Bed, Single/Double Cab, and a special "4x4 Look" 4x2 in Double Cab guise

Single Cabs only come in STD (Standard) grade.
The Double Cab 4x2 comes in STD, STD/GL, and AX (top of the line). The "4x4 Look" comes in STD and AX.
Double Cab 4x4's come in STD and AX designations.

Specs for each Model:

Single Cab (Long/Short) 4x2:
Grade: STD
Engine: Z24S; KA24DE; TD27
Transmission: 5MT
Seating: 3

Double Cab (Long/Short) 4x2:
Grade: STD; STD/GL; AX
Engine: Z24S; KA24DE; TD27; YD25DDTi
Transmission: 5MT available on all, with 4AT available only on KA24DE STD AND AX Models
Seating: 6/5

Double Cab (Long/Short) "4x4 Look" 4x2:
Grade: AX
Engine: YD25DDTi
Transmission: 5MT
Seating: 6/5

Single Cab (Long/Short) 4x4:
Grade: STD
Engine: KA24DE; QD32; ZD30DDT
Transmission: 5MT
Seating: 3

Double Cab (Long/Short) 4x4:
Grade: STD; AX
Engine: KA24DE; QD32; ZD30DDT
Transmission: 5MT
Seating: 6/5

Engines:

Engine Model: Z24S
Type: 4-cyl. in line, OHC, Water-cooled
Bore X Stroke mm: 89.0 X 96.0
Displacement cc: 2,389
Max. power (EEC) kW (PS)/rpm: 74 (101)/4,800
Max. torque (EEC) Nm (kg-m)/rpm: 176(18.0)/2,800
Compression ratio: 8.3 to 1
Fuel System: Downdraft type two-barrel single carburetor, in-tank type electric pump

Transmission Gear Ratios:

Type: Manual 5-speed
1st: 3.985
2nd: 2.246
3rd: 1.415
4th: 1.000
5th: 0.821
reverse: 3.657
Final gear ratio (hypoid final gear): 4.111

Engine Model: KA24DE
Type: Same as Z24S
Bore X Stroke mm: 89.0 X 96.0
Displacement cc: 2,389
Max. power (EEC) kW (PS)/rpm: 110(150)/5,600
Max. torque (EEC) Nm (kg-m)/rpm: 208(21.2)/3,600
Compression ratio: 9.2 to 1
Fuel System: ECCS, electronic fuel injection control

Transmission Gear Ratios:

Type: Manual 5-speed
1st: 3.592
2nd: 2.246
3rd: 1.415
4th: 1.000
5th: 0.821
reverse: 3.657
Final gear ratio (hypoid final gear): 4.111/4.625 (4x4 Models)

Type: Automatic 4-speed
1st: 2.785
2nd: 1.545
3rd: 1.000
4th: 0.694
5th: -
reverse: 2.272
Final gear ratio (hypoid final gear): 4.375

Engine Model: TD27
Type: Diesel, 4-cyl. in-line, OHV with Quick Glow System (Q.G.S.). Water-cooled
Bore X Stroke mm: 96.0 X 92.0
Displacement cc: 2,664
Max. power (EEC) kW (PS)/rpm: 62(85)/4,300
Max. torque (EEC) Nm (kg-m)/rpm: 176(18.0)/2,200
Compression ratio: 21.8 to 1
Fuel System: VE type injection pump with all-speed control type governor

Transmission Gear Ratios:

Type: Manual 5-speed same as in Z24S

Engine Model: QD32
Type: Same as TD27
Bore X Stroke mm: 99.2 X 102.0
Displacement cc: 3,153
Max. power (EEC) kW (PS)/rpm: 76(103)/3,600
Max. torque (EEC) Nm (kg-m)/rpm: 216(22.0)/2,000
Compression ratio: 21.9 to 1
Fuel System: Same as TD27

Transmission Gear Ratios:

Type: Manual 5-speed
1st: 3.580
2nd: 2.077
3rd: 1.360
4th: 1.000
5th: 0.811
reverse: 3.636
Final gear ratio (hypoid final gear): 4.625

Engine Model: ZD30DDT
Type: Diesel, 4-cyl, in-line, DOHC, Water-cooled
Bore X Stroke mm: 96.0 X 102.0
Displacement cc: 2,953
Max. power (EEC) kW (PS)/rpm: 110(150)/3,400
Max. torque (EEC) Nm (kg-m)/rpm: 314(32.0)/2,000
Compression ratio: 17.9 to 1
Fuel System: ECCS, electronic fuel injection control

Transmission Gear Ratios:

Type: Manual 5-speed (all gear ratios are the same as with the QD32 except for 5th and Final Gears)

5th: 0.760
Final gear ratio (hypoid final gear): 4.375

Engine Model: YD25DDTi
Type: Same as ZD30DDT
Bore X Stroke mm: 89.0 X 100.0
Displacement cc: 2,488
Max. power (EEC) kW (PS)/rpm: 98(133)/4,000
Max. torque (EEC) Nm (kg-m)/rpm: 304(31.0)/2,000
Compression ratio: 18.0 to 1
Fuel System: Same as ZD30DDT

Transmission Gear Ratios:

Type: Manual 5-speed same as ZD30DDT

Steering: Recirculating ball-type gear

Suspension:

Front: Independent, double-wishbone torsion bar type with telescopic shock absorbers

Rear: Semi-elliptic leaf spring with telescopic shock absorbers

Brakes:

Front: Ventilated discs

Rear: Drums with automatic adjuster

Not to be confused with the Frontera sold in Europe by GM under the Vauxhall and Opel brands which is basically an Isuzu.

Ron