Can the 2026 Land Rover Defender make a U-turn?

No. Needs more than 40 ft.

42.1ft curb to curb

Street width, feet

Street 40 feet curb to curb.

2026 Land Rover Defender S. Top view, to scale.

2026 Land Rover Defender: turning circle by trim, 40 ft street
Trim	Circle, ft	Margin	One move
S	42.1	-2.1 ft	No
110 P300 S AWD	42.1	-2.1 ft	No
2026 Land Rover Defender 90 P400 Sedona Red AWD	42.1	-2.1 ft	No
90 P400 X-Dynamic SE AWD	38	+2 ft	Yes
130 P300 S AWD	42.1	-2.1 ft	No
X-Dynamic SE	42.1	-2.1 ft	No
110 P400 X-Dynamic SE AWD	42.1	-2.1 ft	No
130 P400 X-Dynamic SE AWD	42.1	-2.1 ft	No
130 P400 Outbound AWD	42.1	-2.1 ft	No
Trophy Edition	42.1	-2.1 ft	No
110 P400 Trophy Edition Deep Sandglow AWD	42.1	-2.1 ft	No
110 P400 Trophy Edition Keswick AWD	42.1	-2.1 ft	No
X	42.1	-2.1 ft	No
110 P400 X AWD	42.1	-2.1 ft	No
110 P500 X-Dynamic SE AWD	42.1	-2.1 ft	No
130 P400 X AWD	42.1	-2.1 ft	No
V8	42.1	-2.1 ft	No
90 P525 V8 AWD	38	+2 ft	Yes
90 V8 AWD	42.1	-2.1 ft	No
110 P525 V8 AWD	42.1	-2.1 ft	No
130 P500 V8 AWD	42.1	-2.1 ft	No
OCTA	42.1	-2.1 ft	No
110 P635 OCTA AWD	42.1	-2.1 ft	No
OCTA Black	42.1	-2.1 ft	No
110 P635 OCTA Black AWD	42.1	-2.1 ft	No
110 OCTA AWD	42.1	-2.1 ft	No
110 OCTA Black AWD	42.1	-2.1 ft	No
110 S AWD	42.1	-2.1 ft	No
110 Trophy Edition AWD	42.1	-2.1 ft	No
110 V8 AWD	42.1	-2.1 ft	No
110 X AWD	42.1	-2.1 ft	No
110 X-Dynamic SE AWD	42.1	-2.1 ft	No
130 Outbound AWD	42.1	-2.1 ft	No
130 S AWD	42.1	-2.1 ft	No
130 V8 AWD	42.1	-2.1 ft	No
130 X AWD	42.1	-2.1 ft	No
130 X-Dynamic SE AWD	42.1	-2.1 ft	No

What this cannot tell you

Curb-to-curb turning circle as listed.

Mirrors and overhang need more room.