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Size comparison · drawn to scale

Mercedes-Benz SL-Class R129 vs Porsche 911 992: size comparison

  • Length 911 992 20 mm0.8 in longer
  • Width 911 992 43 mm2 in wider
  • Height SL-Class R129 11 mm0.4 in taller

Car 1 blue, solid outline

SL-Class R129 Mercedes-Benz · 1989–2001 · Coupé SL-Class R129 4,499 × 1,809 × 1,300 mm14 ft 9 in × 5 ft 11 in × 4 ft 3 in Change

Car 2 coral, dashed outline

911 992 Porsche · 2019–present · Coupé 911 992 4,519 × 1,852 × 1,289 mm14 ft 10 in × 6 ft 1 in × 4 ft 3 in Change
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  • Car 1, blue, solid outline: SL-Class R129
  • Car 2, coral, dashed outline: 911 992
0 m1 m2 m3 m4 m5 m6 m1 m0 ft1 ft2 ft3 ft4 ft5 ft6 ft7 ft8 ft9 ft10 ft11 ft12 ft13 ft14 ft15 ft16 ft17 ft18 ft19 ft1 ft2 ft3 ft4 ftWheelbase 2,515 mmWheelbase 8 ft 3 inLength 4,499 mmLength 14 ft 9 in1,300 mm4 ft 3 inWheelbase 2,450 mmWheelbase 8 ft 0 inLength 4,519 mmLength 14 ft 10 in1,289 mm4 ft 3 in

Scale about 1:20 on a desktop screen · grid 500 mm1 ft · in Overlay both cars start at the front bumper Side view: dashed lines mark the axles

Dimensions and difference

The SL-Class R129 is 20 mm0.8 in shorter, 43 mm2 in narrower and 11 mm0.4 in taller than the 911 992. Its wheelbase is 65 mm3 in longer.

DimensionSL-Class R129911 992Difference, car 1 vs car 2
Length4,499 mm14 ft 9 in14 ft 9 in4,499 mm4,519 mm14 ft 10 in14 ft 10 in4,519 mm −20 mm−0.8 in −0.4%
Width1,809 mm5 ft 11 in5 ft 11 in1,809 mm1,852 mm6 ft 1 in6 ft 1 in1,852 mm −43 mm−2 in −2.3%
Height1,300 mm4 ft 3 in4 ft 3 in1,300 mm1,289 mm4 ft 3 in4 ft 3 in1,289 mm +11 mm+0.4 in +0.9%
Wheelbase2,515 mm8 ft 3 in8 ft 3 in2,515 mm2,450 mm8 ft 0 in8 ft 0 in2,450 mm +65 mm+3 in +2.7%
Footprint8.14 m²87.6 sq ft87.6 sq ft8.14 m²8.37 m²90.1 sq ft90.1 sq ft8.37 m² −0.23 m²−2.5 sq ft −2.8%
Boot265 L9.4 cu ft9.4 cu ft265 LNot in our catalog yet -
Kerb weight1,810 kg3,990 lb3,990 lb1,810 kg1,450–1,715 kg3,197–3,781 lb3,197–3,781 lb1,450–1,715 kg +360 kg+794 lb +24.8%

Width without mirrors. Figures come from the catalog version pages; the drawing uses the same numbers. Body outlines are generic for the body type - proportions are exact, styling is not. Weight difference compares the lightest versions.

Garage and parking

A typical single garage is about 5.5 × 3.0 m18 ft 1 in × 9 ft 10 in inside; a parking bay about 5.0 × 2.5 m16 ft 5 in × 8 ft 2 in. Room to open a door: about 600 mm2 ft each side.

SL-Class R129

Single garage
Tight 1,001 mm3 ft 3 in to spare in length, 596 mm1 ft 11 in each side
Parking bay
Tight 501 mm1 ft 8 in to spare in length, 346 mm1 ft 2 in each side

911 992

Single garage
Tight 981 mm3 ft 3 in to spare in length, 574 mm1 ft 11 in each side
Parking bay
Tight 481 mm1 ft 7 in to spare in length, 324 mm1 ft 1 in each side

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Frequently asked questions

Which is bigger, the Mercedes-Benz SL-Class R129 or the Porsche 911 992?

The Porsche 911 992 is the bigger car by footprint (length × width). The SL-Class R129 is 20 mm shorter, 43 mm narrower and 11 mm taller than the 911 992. Its wheelbase is 65 mm longer.

Will the Mercedes-Benz SL-Class R129 and the Porsche 911 992 fit in a standard garage?

In a typical single garage of 5.5 × 3.0 m inside: The Mercedes-Benz SL-Class R129 fits, but it is tight to get out (1,001 mm to spare in length, 596 mm each side). The Porsche 911 992 fits, but it is tight to get out (981 mm to spare in length, 574 mm each side). Widths are without mirrors; check your own garage with our garage checker.

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