SOURCE REGISTRY

Date: 2026-08-13

Primary-source policy: this registry intentionally uses BMW / BMW Group / BMW M / BMW PressClub primary material for normalization. Secondary sources are not used to assign factory engine codes.

Source-handling notes

• BMW Archive localization can label the same underlying figure as hp, bhp or PS; Power raw therefore preserves source wording.
• A model page proving displacement/power does not automatically prove a full engine suffix. Where the suffix is absent, the database says UNVERIFIED rather than importing enthusiast convention.
• P19-S021 and P19-S022 form an intentional source-conflict pair for the U.S. S50B30US: 240 hp in BMW North America history versus 243 hp / 178 kW in the BMW Group Archive Lightweight card.
• P19-S021 and P19-S032 form a second official conflict pair for S52B32 US: BMW North America history publishes 3201 cc / 240 hp, while BMW Group Archive publishes 3152 cc / 243 hp (178 kW). The Archive technical card is retained as the canonical displacement/power row, with the BMW NA figures preserved as conflict metadata.
• P19-S011 contains BMW Archive wording describing the M62B44TU camshaft-control arrangement. Because this wording warrants an engine-training-document cross-check, the row carries a source-wording flag instead of silently rewriting the primary source.