{
  "source": "Carsbuyer",
  "source_url": "https://carsbuyer.org/pt/depreciacao/opel-astra",
  "licence": "Citação permitida com atribuição a Carsbuyer e indicação da data.",
  "measured": "asking_price",
  "measured_note": "Preços PEDIDOS em anúncios ativos do OLX Portugal, não preços de venda fechados.",
  "collected_until": "2026-09-15",
  "updated_at": "2026-09-15T06:51:28Z",
  "market": "PT",
  "currency": "EUR",
  "brand": "Opel",
  "model": "Astra",
  "slug": "opel-astra",
  "sample_size": 353,
  "method": "Ajuste log-linear do preço pedido mediano sobre o ano de fabrico; a taxa é uma percentagem do valor restante por ano de idade.",
  "annual_depreciation_rate": 0.092,
  "fit_r2": 0.969,
  "reference_year": 2026,
  "measured_age_range": {
    "from": 8,
    "to": 33
  },
  "model_year_range": {
    "from": 1993,
    "to": 2018
  },
  "half_life_years": 7.2,
  "retained_value": {
    "after_1y": 0.908,
    "after_3y": 0.749,
    "after_5y": 0.617,
    "after_8y": 0.462
  },
  "retained_value_base": {
    "model_year": 2018,
    "age": 8,
    "fitted_price_eur": 9138
  },
  "cost_of_one_year_of_age": [
    {
      "age": 8,
      "model_year": 2018,
      "cost_eur": 840
    },
    {
      "age": 9,
      "model_year": 2017,
      "cost_eur": 763
    },
    {
      "age": 10,
      "model_year": 2016,
      "cost_eur": 693
    },
    {
      "age": 11,
      "model_year": 2015,
      "cost_eur": 629
    },
    {
      "age": 12,
      "model_year": 2014,
      "cost_eur": 571
    },
    {
      "age": 13,
      "model_year": 2013,
      "cost_eur": 519
    },
    {
      "age": 14,
      "model_year": 2012,
      "cost_eur": 471
    },
    {
      "age": 15,
      "model_year": 2011,
      "cost_eur": 428
    },
    {
      "age": 16,
      "model_year": 2010,
      "cost_eur": 388
    },
    {
      "age": 17,
      "model_year": 2009,
      "cost_eur": 353
    },
    {
      "age": 18,
      "model_year": 2008,
      "cost_eur": 320
    },
    {
      "age": 19,
      "model_year": 2007,
      "cost_eur": 291
    },
    {
      "age": 20,
      "model_year": 2006,
      "cost_eur": 264
    },
    {
      "age": 21,
      "model_year": 2005,
      "cost_eur": 240
    },
    {
      "age": 22,
      "model_year": 2004,
      "cost_eur": 218
    },
    {
      "age": 23,
      "model_year": 2003,
      "cost_eur": 198
    },
    {
      "age": 24,
      "model_year": 2002,
      "cost_eur": 180
    },
    {
      "age": 25,
      "model_year": 2001,
      "cost_eur": 163
    },
    {
      "age": 26,
      "model_year": 2000,
      "cost_eur": 148
    },
    {
      "age": 27,
      "model_year": 1999,
      "cost_eur": 134
    },
    {
      "age": 28,
      "model_year": 1998,
      "cost_eur": 122
    },
    {
      "age": 30,
      "model_year": 1996,
      "cost_eur": 101
    },
    {
      "age": 32,
      "model_year": 1994,
      "cost_eur": 83
    },
    {
      "age": 33,
      "model_year": 1993,
      "cost_eur": 75
    }
  ],
  "age_from_which_a_year_costs_under": {
    "threshold_eur": 500,
    "age": 14,
    "model_year": 2012,
    "fitted_price_eur": 5122,
    "max_age_considered": 15
  },
  "caveats": [
    "A série é um corte transversal de anos de fabrico diferentes hoje, não o mesmo carro seguido ao longo do tempo.",
    "Entre o ano mais antigo e o mais recente o modelo mudou de geração, por isso parte da diferença de preço é equipamento e não idade.",
    "Os valores em euros saem da curva ajustada; as medianas observadas por ano estão em by_year."
  ],
  "rate_bend": null,
  "rate_bend_note": "Nenhuma quebra entre os 4 e os 15 anos explica os preços melhor do que uma taxa constante: neste modelo a percentagem não abranda com a idade.",
  "by_year": [
    {
      "year": 2018,
      "sample_size": 23,
      "asking_price_median": 8500,
      "mileage_km_median": 152000
    },
    {
      "year": 2017,
      "sample_size": 27,
      "asking_price_median": 8000,
      "mileage_km_median": 165500
    },
    {
      "year": 2016,
      "sample_size": 11,
      "asking_price_median": 7999,
      "mileage_km_median": 143000
    },
    {
      "year": 2015,
      "sample_size": 28,
      "asking_price_median": 6500,
      "mileage_km_median": 194000
    },
    {
      "year": 2014,
      "sample_size": 30,
      "asking_price_median": 6500,
      "mileage_km_median": 229522
    },
    {
      "year": 2013,
      "sample_size": 9,
      "asking_price_median": 5900,
      "mileage_km_median": 195250
    },
    {
      "year": 2012,
      "sample_size": 49,
      "asking_price_median": 4550,
      "mileage_km_median": 225000
    },
    {
      "year": 2011,
      "sample_size": 15,
      "asking_price_median": 5000,
      "mileage_km_median": 239000
    },
    {
      "year": 2010,
      "sample_size": 25,
      "asking_price_median": 4250,
      "mileage_km_median": 221000
    },
    {
      "year": 2009,
      "sample_size": 8,
      "asking_price_median": 3000,
      "mileage_km_median": 268500
    },
    {
      "year": 2008,
      "sample_size": 19,
      "asking_price_median": 3250,
      "mileage_km_median": 255783
    },
    {
      "year": 2007,
      "sample_size": 31,
      "asking_price_median": 3250,
      "mileage_km_median": 230000
    },
    {
      "year": 2006,
      "sample_size": 27,
      "asking_price_median": 3300,
      "mileage_km_median": 259500
    },
    {
      "year": 2005,
      "sample_size": 44,
      "asking_price_median": 2975,
      "mileage_km_median": 248896
    },
    {
      "year": 2004,
      "sample_size": 15,
      "asking_price_median": 2800,
      "mileage_km_median": 273400
    },
    {
      "year": 2003,
      "sample_size": 9,
      "asking_price_median": 2950,
      "mileage_km_median": 380000
    },
    {
      "year": 2002,
      "sample_size": 7,
      "asking_price_median": 1800,
      "mileage_km_median": 216427
    },
    {
      "year": 2001,
      "sample_size": 21,
      "asking_price_median": 1750,
      "mileage_km_median": 280769
    },
    {
      "year": 2000,
      "sample_size": 20,
      "asking_price_median": 1700,
      "mileage_km_median": 240500
    },
    {
      "year": 1999,
      "sample_size": 26,
      "asking_price_median": 1350,
      "mileage_km_median": 250250
    },
    {
      "year": 1998,
      "sample_size": 16,
      "asking_price_median": 1100,
      "mileage_km_median": 250000
    },
    {
      "year": 1996,
      "sample_size": 25,
      "asking_price_median": 950,
      "mileage_km_median": 248500
    },
    {
      "year": 1994,
      "sample_size": 31,
      "asking_price_median": 800,
      "mileage_km_median": 180437
    },
    {
      "year": 1993,
      "sample_size": 22,
      "asking_price_median": 950,
      "mileage_km_median": 205000
    }
  ],
  "related": {
    "model": "https://carsbuyer.org/pt/preco/opel-astra",
    "hub": "https://carsbuyer.org/pt/depreciacao",
    "methodology": "https://carsbuyer.org/pt/metodologia"
  }
}