Chevrolet Gen V LT Engine Specs

Bore, stroke, displacement and compression for all 14 Chevrolet Gen V LT engines, compared side by side. Plus rod ratio and head specs where published.

At a glance

Displacement325–400.6 ci
Cylinders8
Bore3.780–4.104"
Stroke3.150–3.858"
Compression10.0–12.5:1
Advertised power355–755 hp
Years2014–2026

Engines in this family

EngineDisplacementBore × StrokeCRHP
L8T400.6 ci4.065" × 3.8583"10.8:1401
L8T400.6 ci4.065" × 3.8583"—401
Gen V LT · 4.065" × 3.622" · 11.5:1376 ci4.065" × 3.622"11.5:1420–495
Gen V LT · 4.065" × 3.622" · 10:1376 ci4.065" × 3.622"10:1650–755
LT1376 ci4.065" × 3.622"—455
LT4376 ci4.065" × 3.622"—650
LT5376 ci4.065" × 3.622"—755
LT2376 ci4.065" × 3.622"—490–495
L86376 ci4.065" × 3.622"—420
L87376 ci4.065" × 3.622"—420–433
LT6333 ci4.1043" × 3.1496"12.5:1670
L83325 ci3.7795" × 3.622"11:1355
L83325 ci3.7795" × 3.622"—355
L84325 ci3.7795" × 3.622"—355

Factory cars with a Gen V LT

What varies across the family

Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.

Compression spans 10:1 to 12.5:1, so fuel requirements differ meaningfully between members — worth checking before assuming parts interchange.

11 of 14 are oversquare — bore larger than stroke, which favours revs over low-end torque.

Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.

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