Acquisition	API — pulled from a structured API / query endpoint
Vehicle scope	Whole = passenger cars (Ligeiros de Passageiros). Vans, HDV and Buses are fetched too; mopeds and motorcycles are not ingested.
HEV (full hybrids)	split into its own column
Backfill	existing CSV from 2010-01 retained; Google-Sheet patches on demand
Auth	none

Variants

Each variant is its own series with its own CSV. Not every variant is charted in the gallery — the CSV is the authoritative record either way.

Variant	What it counts	Held	Raw data
Whole	New passenger cars — Ligeiros de Passageiros (M1).	2010-01 – 2026-07 199 rows	`data/Portugal.csv`
Vans	Light commercials — Ligeiros de Mercadorias (N1, ≤ 3.5 t).	2026-01 – 2026-07 7 rows	`data/Portugal_Vans.csv`
HDV	Heavy goods vehicles incl. tractor units — Pesados de Mercadorias (N2/N3).	2026-01 – 2026-07 7 rows	`data/Portugal_HDV.csv`
Buses	Buses and coaches — Pesados de Passageiros (M2/M3).	2026-01 – 2026-07 7 rows	`data/Portugal_Buses.csv`

History we hold

Every bar is the span actually present in our stored CSV — breaks in a bar are real gaps in the series, not rendering. Cadence is shown on the right.

Whole 2010-01–2026-07 (199 rows), Vans 2026-01–2026-07 (7 rows), HDV 2026-01–2026-07 (7 rows), Buses 2026-01–2026-07 (7 rows).

Which fuel columns this source fills

A blank column almost never means "no such cars" — it means this source does not split them out, and those vehicles are counted inside another column. Check the caveats for where they land.

	BEV	PHEV	HEV	PETROL	DIESEL	FLEXFUEL	OTHERS
Whole	reported	reported	reported	reported	reported	not reported	reported
Vans	reported	reported	reported	reported	reported	not reported	reported
HDV	reported	always zero	always zero	always zero	reported	not reported	reported
Buses	reported	always zero	always zero	always zero	reported	not reported	reported

reported column exists but is zero in every row not reported by this source. Hover a cell for the row count.

Caveats

Full hybrids (HEV) are reported natively (petrol and diesel hybrids).
Flexfuel is not reported — the column stays empty.
OTHERS is a residual (all-fuels total minus the named fuels).
The commercial variants start in 2025/2026 and are still thin: motordata exposes only the current calendar year and there is no commercial history to backfill. They are fetched and committed, but only Whole is rendered on a schedule — a Weibull fit on a handful of points is meaningless.