{
  "source": "Carsbuyer",
  "source_url": "https://carsbuyer.org/fr/diesel-ou-essence/bmw-420",
  "licence": "Citation autorisée avec mention de la source Carsbuyer et de la date.",
  "measured": "asking_price",
  "measured_note": "Prix DEMANDÉS dans les annonces actives sur AutoScout24, pas des prix de vente conclus.",
  "compares": "fuel_type",
  "method": "log(prix) ~ âge + log(kilométrage) + côté + âge×côté, moindres carrés sur les annonces actives",
  "collected_until": "2026-09-19",
  "updated_at": "2026-09-19T08:29:17Z",
  "market": "FR",
  "currency": "EUR",
  "language": "fr",
  "brand": "BMW",
  "model": "420",
  "slug": "bmw-420",
  "model_years": {
    "from": 2015,
    "to": 2026
  },
  "diesel": {
    "sample_size": 22,
    "annual_depreciation_rate": 0.075,
    "median_asking_eur": 34140,
    "median_mileage_km": 74287
  },
  "gasoline": {
    "sample_size": 41,
    "annual_depreciation_rate": 0.078,
    "median_asking_eur": 44990,
    "median_mileage_km": 36670
  },
  "rate_difference_pp_per_year": 0.3,
  "rate_difference_ci95_half_width_pp": 2.1,
  "distinguishable_at_95": false,
  "holds_value_better": null,
  "fit_r2": 0.884,
  "price_gap_by_age": [
    {
      "age": 1,
      "model_year": 2025,
      "gap_pct": -0.074,
      "ci95_half_width_pct": 0.094,
      "distinguishable_at_95": false
    },
    {
      "age": 5,
      "model_year": 2021,
      "gap_pct": -0.061,
      "ci95_half_width_pct": 0.064,
      "distinguishable_at_95": false
    },
    {
      "age": 6,
      "model_year": 2020,
      "gap_pct": -0.057,
      "ci95_half_width_pct": 0.072,
      "distinguishable_at_95": false
    }
  ],
  "related": {
    "model": "https://carsbuyer.org/fr/cote/bmw-420",
    "duel_index": "https://carsbuyer.org/fr/diesel-ou-essence",
    "methodology": "https://carsbuyer.org/fr/methodologie"
  }
}