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CAT 321 VS Tata Hitachi EX 70 Prime Comparison
CAT 321
₹ 54 L - 55 L
VS
Tata Hitachi EX 70 Prime
₹ 35 L - 36.99 L
CAT 321
₹54L
Tata Hitachi EX 70 Prime
₹35L
Compare excavators helps you make an informed purchase decision.
CAT 321
From ₹ 54 Lakh
Tata Hitachi EX 70 Prime
From ₹ 35 Lakh
Engine
Model
Cat® C3.6
TATA 497 DI 38 BSIII
Model
Cat® C3.6
TATA 497 DI 38 BSIII
Gross Power
100 kw
36 kw
Gross Power
100 kw
36 kw
Net Power
129 kw
36 kw
Net Power
129 kw
36 kw
Engine Power
136 HP
48.9 HP
Engine Power
136 HP
48.9 HP
Engine Displacement
3600 cc
3300 cc
Engine Displacement
3600 cc
3300 cc
Number Of Cylinders
4 Nos
4 Nos
Number Of Cylinders
4 Nos
4 Nos
Rated RPM
2000 rpm
2100 rpm
Rated RPM
2000 rpm
2100 rpm
Emission Standard
BS IV
BS III
Emission Standard
BS IV
BS III
Max Torque
500 Nm
222 Nm
Max Torque
500 Nm
222 Nm
Fuel Type
Diesel
Diesel
Fuel Type
Diesel
Diesel
Operating Weight
Operating Weight
19300 kg
7200 kg
Operating Weight
19300 kg
7200 kg
Machine Weight
19300 kg
7200 kg
Machine Weight
19300 kg
7200 kg
Counter Weight
3650 kg
1200 kg
Counter Weight
3650 kg
1200 kg
Ground Pressure
60 kg
33.3 kg
Ground Pressure
60 kg
33.3 kg
Hydraulic System
Main Pump Type
Electro‑hydraulic main control valve system
2 Variable Displacement Axial Piston Pumps
Main Pump Type
Electro‑hydraulic main control valve system
2 Variable Displacement Axial Piston Pumps
Maximum Hydraulic Flow
315 L/min
120 L/min
Maximum Hydraulic Flow
315 L/min
120 L/min
Maximum System Pressure
350 bar
259 bar
Maximum System Pressure
350 bar
259 bar
Hydraulic Oil Capacity
218 litres
92 litres
Hydraulic Oil Capacity
218 litres
92 litres
Auxiliary Hydraulic Flow
120 L/min
36 L/min
Auxiliary Hydraulic Flow
120 L/min
36 L/min
Working Range
Max Digging Depth
5970 mm
4150 mm
Max Digging Depth
5970 mm
4150 mm
Max Vertical Wall Digging Depth
5360 mm
4060 mm
Max Vertical Wall Digging Depth
5360 mm
4060 mm
Max Reach at Ground Level
9150 mm
6660 mm
Max Reach at Ground Level
9150 mm
6660 mm
Max Dumping Height
6250 mm
5470 mm
Max Dumping Height
6250 mm
5470 mm
Max Cutting Height
9120 mm
7550 mm
Max Cutting Height
9120 mm
7550 mm
Boom Length
5.700 m
3.720 m
Boom Length
5.700 m
3.720 m
Arm Length
2250 mm
2120 mm
Arm Length
2250 mm
2120 mm
Bucket Breakout Force
135 kN
47 kN
Bucket Breakout Force
135 kN
47 kN
Arm Tear-out Force
119 kN
36.3 kN
Arm Tear-out Force
119 kN
36.3 kN
Capacities
Fuel Tank Capacity
370 litres
135 litres
Fuel Tank Capacity
370 litres
135 litres
Hydraulic Tank Capacity
218 litres
42 litres
Hydraulic Tank Capacity
218 litres
42 litres
Cooling System Capacity
25 litres
15.5 litres
Cooling System Capacity
25 litres
15.5 litres
Engine Oil Capacity
11 litres
9 litres
Engine Oil Capacity
11 litres
9 litres
Swing Drive Oil Capacity
6 litres
7 litres
Swing Drive Oil Capacity
6 litres
7 litres
Final Drive Gear Oil Capacity
6 litres
10 litres
Final Drive Gear Oil Capacity
6 litres
10 litres
Under Carriage
Track Shoe Width
800 mm
450 mm
Track Shoe Width
800 mm
450 mm
Track Gauge
2380 mm
1850 mm
Track Gauge
2380 mm
1850 mm
Track Length on Ground
3650 mm
2090 mm
Track Length on Ground
3650 mm
2090 mm
Ground Clearance
450 mm
360 mm
Ground Clearance
450 mm
360 mm
Tail Swing Radius
1676 mm
1750 mm
Tail Swing Radius
1676 mm
1750 mm
Undercarriage Type
Crawler — steel tracks
Tracked undercarriage with grease track tensioning (standard crawler system)
Undercarriage Type
Crawler — steel tracks
Tracked undercarriage with grease track tensioning (standard crawler system)
Steering & Brakes
Overall Length
9570 mm
6080 mm
Overall Length
9570 mm
6080 mm
Overall Width
2800 mm
2382 mm
Overall Width
2800 mm
2382 mm
Overall Height
3250 mm
2690 mm
Overall Height
3250 mm
2690 mm
Cab Height
3250 mm
2690 mm
Cab Height
3250 mm
2690 mm
Boom Height
3.300 m
3.271 m
Boom Height
3.300 m
3.271 m
Track Width
600 mm
450 mm
Track Width
600 mm
450 mm
Performances
Travel Speed
10 km/h
5 km/h
Travel Speed
10 km/h
5 km/h
Swing Speed
10 rpm
12.8 rpm
Swing Speed
10 rpm
12.8 rpm
Gradeability
27 %
53 %
Gradeability
27 %
53 %
Drawbar Pull
150 kN
210 kN
Drawbar Pull
150 kN
210 kN
Bucket And Attachments
Bucket Capacity
1 Cu.m
0.13 Cu.m
Bucket Capacity
1 Cu.m
0.13 Cu.m
Bucket Options
0.8
0.13 – 0.68
Bucket Options
0.8
0.13 – 0.68
Attachment Compatibility
Breaker, Auger, Grapple (with auxiliary hydraulics)
Standard hydraulics for breakers/thumbs
Attachment Compatibility
Breaker, Auger, Grapple (with auxiliary hydraulics)
Standard hydraulics for breakers/thumbs
Cabin And Controls
Cabin AC
Yes
Yes
Cabin AC
Yes
Yes
Display Type
8 LCD Touch Screen
Standard monitor
Display Type
8 LCD Touch Screen
Standard monitor
Joystick Controls
Yes
Yes
Joystick Controls
Yes
Yes
Seat Type
Suspension Seat
Adjustable ergonomic
Seat Type
Suspension Seat
Adjustable ergonomic
Noise Level
70 dB(A)
78 dB(A)
Noise Level
70 dB(A)
78 dB(A)
Safety Features
-
-
Safety Features
-
-
Electrical System
Battery
2X12 V
24 V
Battery
2X12 V
24 V
Alternator Output
100 A
80 A
Alternator Output
100 A
80 A
Lighting Type
LED
Halogen
Lighting Type
LED
Halogen
Additional Features
Auto Idle
Yes
Yes
Auto Idle
Yes
Yes
Eco Mode
Yes
Yes
Eco Mode
Yes
Yes
Telematics
No
Yes
Telematics
No
Yes
Diagnostic System
Yes
Yes
Diagnostic System
Yes
Yes
CAT 321
Pros
- 136 HP Cat C3.6 engine delivers strong digging performance.
- An advanced electrohydraulic system improves cycle time.
- Eco Mode and Intelligent ECM help reduce fuel consumption
Tata Hitachi EX 70 Prime
Pros
- Compact yet capable: Good digging depth (≈4.6 m) and reach for a ~7.2 t class machine.
- Fuel-efficient: Relatively low diesel consumption compared with some competitors.
- Optional AC cabin: Boosts operator comfort on longer shifts
