Oldsmobile L35 specs: 262 ci (4.3L) 6-cylinder, 4.00 x 3.48 in (101.6 x 88.4 mm) bore and stroke. Rated 190-200 hp, 1992–2001. Used in the Oldsmobile Bravada.
The Oldsmobile 262ci (L35) is oversquare — the 4" bore exceeds the 3.4803" stroke by 14.9% — a layout that favors airflow and RPM over leverage at the crank. The 3.4803" stroke puts mean piston speed at 4,000 ft/min around 6,900 RPM, which is where a production bottom end is generally considered at its limit. A rod ratio of 1.638 is in the range most production engines fall in. Each of the 6 cylinders displaces 43.7 ci (716 cc).
It is one of 3 engines in the Oldsmobile 262ci family, all of them 262 ci — the differences between them are in compression, heads and rating, not displacement. 9 factory variants share these dimensions, rated from 190 to 200 hp across 1992–2001.
Dimensions
Displacement
262 ci / 4.3 L
Bore
4"
Stroke
3.4803"
Cylinders
6
Configuration
V6
Compression ratio
9.1–9.2:1 (published figures vary)
Rod length
5.7"
Rod ratio
1.638
Bore/stroke ratio
1.149
Construction
Block material
cast iron
Head material
cast iron
Valvetrain
OHV
Fuel type
gas
Advertised HP
190–200 hp
Years
1992–2001
Factory ratings by year
Year
Version
HP @ rpm
Torque @ rpm
Comp.
1993
LB4 net
200 @ 4500 *
260 lb-ft @ 3600 *
9.1:1 *
1998
L35 net
190 @ 4400
250 lb-ft @ 2800
9.2:1
Factory specification sheet. * Not yet cross-verified.
What these numbers mean
Bore/stroke character
1.149 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves
Mean piston speed at 6,000 RPM
3,480 ft/min — conservative for a street engine
Rod ratio
1.638 — moderate — the range most production V8s fall in
Displacement per cylinder
43.7 ci
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