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CAT 321 VS Tata Hitachi ZAXIS 670H Comparison
CAT 321
₹ 54 L - 55 L
VS
Tata Hitachi ZAXIS 670H
₹ 60 L - 74.99 L
CAT 321
₹54L
Tata Hitachi ZAXIS 670H
₹60L
Compare excavators helps you make an informed purchase decision.
CAT 321
From ₹ 54 Lakh
Tata Hitachi ZAXIS 670H
From ₹ 60 Lakh
Engine
Model
Cat® C3.6
Isuzu BB‑6WG1X (Turbocharged 4‑cycle, direct injection, water cooled)
Model
Cat® C3.6
Isuzu BB‑6WG1X (Turbocharged 4‑cycle, direct injection, water cooled)
Gross Power
100 kw
295 kw
Gross Power
100 kw
295 kw
Net Power
129 kw
295 kw
Net Power
129 kw
295 kw
Engine Power
136 HP
395 HP
Engine Power
136 HP
395 HP
Engine Displacement
3600 cc
15681 cc
Engine Displacement
3600 cc
15681 cc
Number Of Cylinders
4 Nos
6 Nos
Number Of Cylinders
4 Nos
6 Nos
Rated RPM
2000 rpm
1800 rpm
Rated RPM
2000 rpm
1800 rpm
Emission Standard
BS IV
BS II
Emission Standard
BS IV
BS II
Max Torque
500 Nm
1540 Nm
Max Torque
500 Nm
1540 Nm
Fuel Type
Diesel
Diesel
Fuel Type
Diesel
Diesel
Operating Weight
Operating Weight
19300 kg
63500 kg
Operating Weight
19300 kg
63500 kg
Machine Weight
19300 kg
63500 kg
Machine Weight
19300 kg
63500 kg
Counter Weight
3650 kg
12002 kg
Counter Weight
3650 kg
12002 kg
Ground Pressure
60 kg
107 kg
Ground Pressure
60 kg
107 kg
Hydraulic System
Main Pump Type
Electro‑hydraulic main control valve system
Variable displacement axial piston pumps
Main Pump Type
Electro‑hydraulic main control valve system
Variable displacement axial piston pumps
Maximum Hydraulic Flow
315 L/min
950 L/min
Maximum Hydraulic Flow
315 L/min
950 L/min
Maximum System Pressure
350 bar
309 bar
Maximum System Pressure
350 bar
309 bar
Hydraulic Oil Capacity
218 litres
618 litres
Hydraulic Oil Capacity
218 litres
618 litres
Auxiliary Hydraulic Flow
120 L/min
30 L/min
Auxiliary Hydraulic Flow
120 L/min
30 L/min
Working Range
Max Digging Depth
5970 mm
7046 mm
Max Digging Depth
5970 mm
7046 mm
Max Vertical Wall Digging Depth
5360 mm
6886 mm
Max Vertical Wall Digging Depth
5360 mm
6886 mm
Max Reach at Ground Level
9150 mm
11370 mm
Max Reach at Ground Level
9150 mm
11370 mm
Max Dumping Height
6250 mm
6886 mm
Max Dumping Height
6250 mm
6886 mm
Max Cutting Height
9120 mm
10867 mm
Max Cutting Height
9120 mm
10867 mm
Boom Length
5.700 m
6.600 m
Boom Length
5.700 m
6.600 m
Arm Length
2250 mm
2900 mm
Arm Length
2250 mm
2900 mm
Bucket Breakout Force
135 kN
308 kN
Bucket Breakout Force
135 kN
308 kN
Arm Tear-out Force
119 kN
258 kN
Arm Tear-out Force
119 kN
258 kN
Capacities
Fuel Tank Capacity
370 litres
740 litres
Fuel Tank Capacity
370 litres
740 litres
Hydraulic Tank Capacity
218 litres
310 litres
Hydraulic Tank Capacity
218 litres
310 litres
Cooling System Capacity
25 litres
98 litres
Cooling System Capacity
25 litres
98 litres
Engine Oil Capacity
11 litres
55 litres
Engine Oil Capacity
11 litres
55 litres
Swing Drive Oil Capacity
6 litres
12 litres
Swing Drive Oil Capacity
6 litres
12 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
600 mm
Track Shoe Width
800 mm
600 mm
Track Gauge
2380 mm
3200 mm
Track Gauge
2380 mm
3200 mm
Track Length on Ground
3650 mm
4250 mm
Track Length on Ground
3650 mm
4250 mm
Ground Clearance
450 mm
800 mm
Ground Clearance
450 mm
800 mm
Tail Swing Radius
1676 mm
3800 mm
Tail Swing Radius
1676 mm
3800 mm
Undercarriage Type
Crawler — steel tracks
Tracked undercarriage with steel grouser shoes and grease tensioning (heavy crawler configuration for excavators)
Undercarriage Type
Crawler — steel tracks
Tracked undercarriage with steel grouser shoes and grease tensioning (heavy crawler configuration for excavators)
Steering & Brakes
Overall Length
9570 mm
11650 mm
Overall Length
9570 mm
11650 mm
Overall Width
2800 mm
3200 mm
Overall Width
2800 mm
3200 mm
Overall Height
3250 mm
3500 mm
Overall Height
3250 mm
3500 mm
Cab Height
3250 mm
3500 mm
Cab Height
3250 mm
3500 mm
Boom Height
3.300 m
3.700 m
Boom Height
3.300 m
3.700 m
Track Width
600 mm
600 mm
Track Width
600 mm
600 mm
Performances
Travel Speed
10 km/h
5 km/h
Travel Speed
10 km/h
5 km/h
Swing Speed
10 rpm
10.2 rpm
Swing Speed
10 rpm
10.2 rpm
Gradeability
27 %
70 %
Gradeability
27 %
70 %
Drawbar Pull
150 kN
415 kN
Drawbar Pull
150 kN
415 kN
Bucket And Attachments
Bucket Capacity
1 Cu.m
3.3 Cu.m
Bucket Capacity
1 Cu.m
3.3 Cu.m
Bucket Options
0.8
3.3 - 4.1
Bucket Options
0.8
3.3 - 4.1
Attachment Compatibility
Breaker, Auger, Grapple (with auxiliary hydraulics)
Breaker, ripper, grapples
Attachment Compatibility
Breaker, Auger, Grapple (with auxiliary hydraulics)
Breaker, ripper, grapples
Cabin And Controls
Cabin AC
Yes
Yes
Cabin AC
Yes
Yes
Display Type
8 LCD Touch Screen
Digital + analog monitor
Display Type
8 LCD Touch Screen
Digital + analog monitor
Joystick Controls
Yes
Yes
Joystick Controls
Yes
Yes
Seat Type
Suspension Seat
Adjustable suspension
Seat Type
Suspension Seat
Adjustable suspension
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
2x12 V
Battery
2X12 V
2x12 V
Alternator Output
100 A
50 A
Alternator Output
100 A
50 A
Lighting Type
LED
LED
Lighting Type
LED
LED
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 ZAXIS 670H
Pros
- High Hydraulic Flow: ~950 L/min total — supports powerful digging and attachments.
- Large Engine Output: 395 HP in a heavy crawler class supports effective performance.
- High Boom/Cut Height: ~10.9 m — effective for loading trucks and high dumps.
