Engine section with per-field provenance. Each key (power_hp, power_kw, torque_nm, displacement_cm3, cylinders, valves_per_cyl, compression_ratio, fuel_type and more) maps to an object { value, unit, source, alternatives }, where source is the winning source and alternatives lists competing values from the other sources. Any traced value may also carry an optional measurementKind of measured, calculated or manufacturer-claimed, describing how that figure was obtained rather than who published it. Most values do not carry it: the property is absent whenever the source stated no method, and its absence must not be read as measured.
Example:{
"power_hp": {
"value": 245,
"unit": "hp",
"source": "autodata",
"alternatives": [
{
"value": 245,
"source": "ultimatespecs"
}
]
}
}